this morning as charlie rangel refuses to resign, yet another democrat in congress is embroiled in an ethics investigation. can the scandal shift the balance in the midterm elections? bp and the government begin to scale back cleanup efforts now that the well is contained, but residents of the gulf coast say they are leaving way too early. more beaches are closed in the northeast this weekend as great whites swim closer to shore. now a team of scientists is trying to track and tag the deadly sharks. we go along for the hunt. and chelsea clinton's wedding is a picture-perfect affair. we have the photos, the inside details and who was and wasn't there. >> she looked so happy in those pictures. >> she looked beautiful.

good morning, everybody. we're still talking about the wedding. we knew it was official early last evening when chelsea's parents released this statement "we could not have asked for a more perfect day. we are so happy to welcome marc into our family." let's look at these beautiful pictures again. there she is beaming in a strapless vera wang dress. there's the former president walking her down the aisle, the proud papa and the clintons with their son-in-law. hillary, by the way, was wearing oscar de la renta. >> unfortunately, no photos of roger clinton doing the electric slide. we hoped for that. but there was a rabbi, a reverend there, as well. despite the rumors, no fireworks, no oprah. no spielberg, no streisand. mostly friends and family. probably didn't cost $5 million in the end but we'll tell you all about it. >> we spotted oprah. no, she wasn't at the wedding. may have been in the area.

also this morning if you fly the skies, they're supposed to be safer starting this morning. while you get screened before you get on board planes every morning, all kinds of cargo flying with us didn't until today. why did it take so long and are there still some cracks in the system. an important report we have coming up in the show. also, lightning can be really dangerous for pilots, golfers, but hundreds of years after ben franklin flew his kite, this power of nature still mysterious, so this morning we're talking about scientists, lightning chasers, trying to understand the electrical phenomenon. >> mary will tell us more about that. we begin with another serious ethics charge against another democratic member of congress. representative maxine waters will now face an ethics trial this fall, this after a week where charlie rangel's ethics investigation made headlines. these two may have repercussions across the country on election day and david kerley is in washington this morning with the

story. good morning, david. >> reporter: good morning, bianna. already saddled with high unemployment and anemic economic growth, this is something they hoped to avoid. >> i can't hear you. >> reporter: two of their members facing ethics charges of the first it was new york's charlie rangel. first it was charlie rangel. now word that another democratic member, maxine waters may have an ethics trial in the house. >> it will hurt the democrats because it will be fresh in the voters' minds. >> reporter: rangel is facing charges he evaded charges and waters facing charges she helped a bank with a bailout. it all flies in the face what have democrats promised when they took over congress. >> we will keep our promise to drain the swamp. >> the fact is the swamp has not been drained. >> reporter: the white house seized this as a distraction, and the president offered only tepid support for rangel. >> i think charlie rangel served a very long time and served his constituents very well, but

these allegations are very troubling and, you know, he's somebody at the end of his career, 80 years old, i'm sure that what he wants is to be able to end his career with dignity, and my hope is that that happens. >> reporter: republicans seem to be trying to stay out of the way relishing in the democratic troubles. >> i think the members of congress and particularly the party leaders understand just how powerful the idea that the majority party is not only potentially doing the wrong thing public policywise, but actually sort of cheating the people, so that's an argument that i think we'll hear any minority make against any majority for a long time to come. >> reporter: basically it's the way to win back power? >> it's the way 0 win power. >> reporter: it is rare these cases actually go to trial in the house of representatives, but both members are demanding a public trial, something the democrats had hoped to avoid. actually worked to avoid. the only good news for the democrats is this is coming out a couple of months before the

election rather than a couple of weeks before the election. bill? >> that's really cold comfort though and david kerley from washington, thanks to you. for more on this, let's bring in the newest member of the abc news family make her debut, host of "this week," christiane amanpour. welcome and congratulations. >> thank you so much, and good morning to you. >> it's great to welcoe yo abo and your exclusouse speaker n bimeyht o aret e what did she have to say a all this roil and conflict? >> well, she did, in fact, address it because i asked her directly in a wide-ranging interview but asking her how all of this squared with the democrats' effort to have an ethical congress, to drain the swamp, how their affection and respect for their colleague, their longtime colleagues squared with all of this. listen to what nancy pelosi had to say. >> when i came in, i said we will drain the swamp and we did. we passed the most sweeping ethics reform in the history of

the congress and personal respect and affection we may have for people makes us sudden sad about the course of events. but we have to pull the highest of standards and none of our personalities is more important than that. >> she was very, very clear about that and also said that she herself was out of the loop. the ethics panel is bipartisan. she has nothing to do with it but very clear that whatever came out of that, that's what they would all obviously abide by. bill? >> okay. well, let's shift to the other big story of the week, if not the year, that is the wikileaks document leak of those 90,000 internal classified documents on the war in afghanistan. defense secretary robert gates broke his silence to you and i imagine some concern on his behalf, yeah? >> absolutely. you know, there is a big debate over what new it says about the actual war, and some people are saying that it actually says a lot about the war. others are saying, no, it doesn't, but what it does say according to the secretary of defense is that

sources have been compromised, particularly afghan sources inside afghanistan who are putting their lives on the line to try to help the united states forces there. so they're very concerned about it. secretary gates called the whole leak, he said he was mortified and appalled by it, and he also said that whether or not the leakers were legally culpable, they were certainly morally so. >> interesting. well, finally, before you go, we have to ask, you know, few journalists, foreign journalists have more impeccable credentials as you throughout the years, so it's great to have you on the team. and so many people wonder what is "this week" going to look like, you know, through the prism of christiane amanpour's experience? >> well, you know, it's great to be on the team. it's great to be in the chair and really having an opportunity to be part of this incredible tradition of "this week" that goes back 30-odd years. what i think is that having covered the world for 20 years as a foreign correspondent, i really have firsthand experience

of all the global challenges, opportunities that confront americans every day, so i would like to open a window onto the world, but additionally, especially i would like to explore as a journalist this big story here in the united states, really explore the policies, how they affect the people of the united states and see whether we can see where politics and policy meet and eventually meet to meet the needs of the people. >> all right. well, we'll be watching. once again, congratulations. christiane amanpour. >> thank you. >> you can see her host her debut episode of "this week" as mentioned there with speaker pelosi, secretary gates coming up across most of the kipts. >> looking forward to seeing her host "this week" and watching the show this morning. the buzz around the country is that wedding we've been talking about, chelsea clinton and investment banker marc mezvinsky got married in rhinebeck, new york, last night and despite all the media coverage leading up to it, there were still a few surprises. our linsey davis is in rhinebeck

with all the details. good morning, linsey. >> reporter: good morning, bianna. what a feat chelsea and marc pulled off. somehow they managed to keep an estimated 400 wedding guests quiet and keep the media guessing all along the way. now we don't have to rely on speculation to fill in the gap, we have actual answers and even pictures. at last, the veil of secrecy lifted. chelsea clinton, the young girl we met in the white house, is now all grown up. she was stunning in her gown designed by vera wang. it had silver beading circling her waist, and she wore a smile similar to her mother's. chelsea said her vows to marc mezvinsky on her own terms without paparazzi or press. the former president reportedly slimmed down for the affair losing more than 15 pounds before walking chelsea down the aisle. the mother of the bride beamed in fuchsia designed by oscar de la renta. around 7:30 it was official. the couple had tied the knot. in an e-mail the clinton family said "today we watched with great pride and overwhelming

emotion as chelsea and marc wed in a beautiful ceremony at astor courts. we could not have asked for a more perfect day to celebrate the beginning of their life together." the interfaith ceremony included elms from both the jewish and christian tradition. the big names the media had buzzed about for weeks weren't there for the nuptials. as far as who was there to witness it all, mat majority of the guests were 20 and 30-something, friends of the bride and groom. but those prominent names who did show up included vernon jordan, former secretary of state madeleine albright, actors ted danson and his wife mary steenburgen. >> the entire team is all "a" list, a vera wang gown, bryan rafanelli, the party planner. jeff latham coming from the george sanc hotel in paris. these are all the big ticket players. >> reporter: while we still don't know how much the wedding cost, the bride and groom certainly looked like more than a million bucks. so there were no fireworks after

all. there were a few other misnomers sprinkled in there but the one question still remains aside from how much it all cost is where is their honeymoon? let the speculation begin. >> we were wondering. you actually spoke with a couple of the guests. >> mum's the word. even when we talked to some heading to the reception, all we got out of them was that they were from london. otherwise, they said wedding, what wedding? but people were staying at our hotel. they didn't get in until about 4:30 in the morning and were overheard saying "it was a great party." >> it sure sounds like it. glad you got to spend time in beautiful rhinebeck. thank you, linsey. >> rhinebeck is -- that's some good publicity for that little down. let's go to jeremy hubbard filling in for ron claiborne with the other headlines. hey there. >> good morning, bill, good morning, bianna. good morning, everyone. those efforts to permanently

close the damaged oil well in the gulf may start this week. meantime, as cleanup efforts begin to wind down, some in the gulf wonder if bp has become too optimistic. here's abc's jeffrey kofman. >> reporter: they are packing up the oil boom with federal officials declaring that the threat of oil coming ashore has passed in alabama and florida. the boom is disappearing. that does not please tray tillman. >> they say it's not visible and everything, but every time we come in from fishing, there's oil on the side of the boat. >> this week the fisheries off mississippi and eastern louisiana re-opened, the waters declared safe. peter youngblood, a crabber, is still working for bp looking for oil. what do you got there? >> this is just some samples to see how thick it is. >> reporter: is that oil? >> yes. >> reporter: like so many here, youngblood worries that there is a rush to say that the water is clean. >> i think everybody is going to go back fishing and then all of this is going to pop up and they'll have to shut everything down and it's going to screw up our lives for years. >> reporter: the real fear is with the oil gone from the surface, it is lingering below. this weekend was the 82nd annual blessing of the fishing fleet in st. bernard parish.

do you feel like we've turned a corner? >> i think we have turned a corner but we have a long way to go. >> reporter: a nagging fear that the nation will lose interest before the disaster is really over. for "good morning america," jeffrey kofman, yscloskey, louisiana. more than 1,100 people are dead and 27,000 still trapped after monsoons caused massive flooding in pakistan. rescue efforts are hampered by damaged roads and bridges. more than 300,000 army troops have been sent in. survivors don't have enough shelter and face a growing threat of disease. meantime, iran says three american hikers jailed a year ago should stand trial on charges of illegaling kroding the border. some in the u.s. believe a fast trial on trespassing charges might speed the hikers' return to the united states. three convicted murderers have escaped from an arizona prison about 90 miles southeast of las vegas. the men apparently cut through a fence and kidnapped two truck

drivers before fleeing in their semi truck. and finally, captured on surveillance video, a dancing robbery. a man held up a gas station as his female partner danced on the counter to distract the clerk. pretty light on her feet there. the gas station employee fought back and the dancing robbers left empty-handed. i think it was wham! who told us guilty feet have got no rhythm. >> whoa! >> good one. good one. welcome to the weekend, brother. >> it was either wham! or chaucer. i can't -- >> stick with wham! >> hi, mary. top that. >> good morning. rain, a lot of it. good morning, everyone. we show you some record rainfall in phoenix, arizona, making getting around town just very, very difficult. nearly 1 1/2 inches fell yesterday, and as i mentioned, they've not seen that kind of rain ever. good news is that the rain sort of dissipates in phoenix, but we do have flood watches in about four states, the four corner states. north and east of there we're taking a look at severe storms.

the threat here really is going to be the 80-mile-per-hour wind >> thank you so much. coming up, we're going to tell you about the continued record heat in the southeast. bill? >> okay, marysol. let's turn now to your safety in the skies, and you may be stunned to learn that while all of us were wrestling our bags and ourselves through security all this time, billions of tons of unscreened cargo ended

up in the bellies of the same planes but finally now nine years after 9/11, that is changing. here is lisa stark. >> reporter: it's not just passengers and luggage that get stuffed onto passenger planes, cargo does, too. an estimated 7 billion pounds a year. but unlike passengers and luggage, not all of it was screened until today. so what if a box doesn't get screened, does it get put on a plane? >> no. it doesn't get put on plane. so if a box does not get screened, cargo will not go on a passenger plane after august 1. >> reporter: tsa bomb-sniffing dogs will do a small part of the screening, but it's really up to airlines and cargo companies to ensure there are no bombs hidden in boxes. >> i think for you and i, when we get on an airplane, we'd like to know the cargo that's on the plane underneath us has been screened. >> reporter: this company from dulles airport and nine others nationwide have been certified by the tsa to handle cargo screening.

>> if somebody put in them, you'd be able to spot them. >> reporter: the new tsa administrator, got a firsthand look. here cargo is x-rayed before swiped for explosive residue. even hand-checked if need be. tsa still acknowledges there is still a security gap and not able to screen all the cargo coming in on passenger planes from overseas. and that's about 10 million pounds of cargo every day. with cargo arriving on planes from 94 countries tsa estimates another three years to put that screening in place. critics say that is far too long. >> so every country, every airline, every cargo company has to know that we will not compromise in our protections of the safety of passengers on planes. >> reporter: tsa's chief said they are screening what the agency considers high-risk cargo from overseas but pistole won't be comfortable until they get it all. >> we know that terrorists are looking for opportunities to exploit any vulnerabilities, any

weaknesses we have, any gaps in our layered security. >> reporter: a security gap which today is narrower than ever but still far from closed. for "good morning america," lisa stark, abc news, dulles, virginia. well, from danger in the skies to danger in the water, there's been a surge of shark sightings in the northeast this summer, and it's been so bad off cape cod, massachusetts, that scientists are trying to track and tag the great whites to find out why they're coming so close to shore. jeremy has been following the story. >> well, bianna, yesterday alone eight more great white sharks were spotted off cape cod. that's on top of several other sightings over the last few days. now with the help of airplanes boats and harpoon guns, researchers are getting answers about why the sharks are showing up. nearly a dozen great whites were spotted off the shore of cape cod in the last week alone. now on this one beach, swimming has been banned indefinitely. >> a little fearful, yes. they're great whites after all,

and i think we should be respectful. >> reporter: and now the hunt is on for the monstrous sharks. we went along as researchers tracked down the great whites this weekend. first pilots spot the sharks from above. then relay the location to a patrol boat waiting below. from there a crew member with a harpoon jabs them with a satellite tag. >> he will place the tag at the base of the shark's dorsal fin and the tag archives information about temperature, depth and light levels. >> right there. >> reporter: they're hoping to learn more about where they're coming from and why they're here. the fact is that sharks of all kinds have made their way to northwest beaches this summer leading to warnings, beach evacuations and scare force swimmers. on friday a dark dorsal fin popped up out of the water in new jersey. moments later, a harmless but scream-inducing sand shark swam ashore but it is the great whites greg and his team are curious about. those tags will relate crucial data to a satellite's migratory

path. >> provides an opportunity for us to get clues as to how this animal lives in this part of the world. >> reporter: scientists know the sharks are coming here to feed on the area's exploding population of gray seals. they rarely attack humans except of course in the movies but authorities are warning swimmers to be on the lookout just in case. and, again, they think it's because of the exploding seal population there. the researchers say it's as if a restaurant has opened up for the sharks to dine. of the eight spotted yesterday they tagged just one. >> oh, interesting. it's amazing how little we know about these migratory -- >> especially in this part of the world. >> but it does seem like a theme we've been hearing about a lot. >> note to self, try not to look like a seal. coming up, chelsea's big day. we have the lowdown of the glamorous event that turned a tiny town upside down. and when lightning strikes they don't run for cover, they get a charge out of chasing it.

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we're taking a look at a force of nature, and i'm not talking about the responsibility to do chin-ups. lightning, lightning like you've never seen it before. >> wow. look at that. >> oh, my gosh. >> we see images of exactly what

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♪ isn't she lovely isn't she wonderful ♪ ah, there she is, through the year, chelsea clinton from gawky teen to beautiful bride. she and marc mezvinsky tied the knot in in a lavish ceremony at an estate in rhinebeck, new york. and we'll have all the details on the wedding, the dress, the guests, the ceremony all coming up. good morning, america. i'm bianna golodryga. >> i'm bill weir. it is sunday, august 1st. also ahead trying to capture lightning, not in a bottle, but in a database. we'll meet some scientists, storm chasers, studying the beautiful and powerful phenomenon. did you know that the average lightning bolt can reach 50,000 degrees fahrenheit, five times hotter than the surface of the sun?

interesting. >> amazing video. also our "weekend window" opens to the buffalo national river in arkansas. can't wait to see that. but we begin with the most talked about wedding in years, the clinton/mezvinsky nuptials that took place last night, linsey davis is in rhinebeck, new york, where the happy couple exchanged vows. good morning again, linsey. >> reporter: good morning, bianna. just to give you an idea of how cloak and dagger the entire wedding was, when we tried to talk to some wedding guests, in from london, they simply said, wedding, what wedding? but now the veil of secrecy is slowly bein for starters the wedding dress and the bridesmaids dresses were designed by family friend vera wang. the groom's tuxedo and all of groomsmen's ties and president clinton's ties were designed by burberry. secretary of state hillary clinton was decked out in fuchsia designed by oscar de la renta and the reception catered by the st. regis. so in the end there was no

oprah, no fireworks but likely a lot of fireworks at asto rchr court estates. during the ceremony they read the poem "the life that i have" by leo marks. the life that i have is all that i have, and the life that i have is yours. very sweet, very sweet stuff. >> thank you, linsey. i don't know if there was a motorcycle. joining us now to dish is bonnie fuller, president and editor in chief of hollywoodlife.com and celebrity wedding planner shawn rabidou. if he looks familiar, he was on a reality, show, yes. bethenny frankel, you know her, wedding planner, as well. >> yes, i was. >> well, let's talk go this wedding yesterday. chelsea clinton, i think, looked beautiful in the dress. give us some more detail, bonnie. >> she was absolutely stunning. she reminded me of grace kelly with her hair very lightly pulled back wearing a strapless gown. i think what really set it off was that gorgeous silver belt, >> yes. >> it was ornate but classic and then the tulle -- the tulle

fairy tale skirt. it was just absolutely wonderful. >> i agree. >> amazing video. >> and the flowers were beautiful. >> the flowers were -- they were very simple. they were classic. they were clean, and i think it all just went together as a package. i money, you know, it really stated elegance. and the belt to the dress for me just symbolized a little new york. that edge of new york. it was elegant. >> it was and she only wore very simple diamond earrings, a very simple diamond bracelet. >> yeah. >> there was nothing ornate or over the top, and it really kept in keeping with the whole style of the wedding. very classic. the white runner, the white benches and as it turned out, it was a very classic format. >> i think it's very indicative of her taste. she, you know, she is classic. she is elegant, and, you know she's got a sense of tradi verhat eallf1 ose of tradi >> so her look was a winner.

how about her parents? we know he lost 20 pounds. >> he looked fabulous. he looked great in that dark suit and hillary looked fabulous in that fuchsia gown. she looked like the mother of the bride. >> she wore oscar de la renta and what i noticed is how much she freshened up her look because hillary has been having kind of shellacked hair, however, she was -- her hair was barely done. her makeup was very fresh. it was a different look for her, and i thought, thank goodness bill got his suit fitted because when he was out at the rehearsal dinner, it looked about two sizes too big. >> right. >> this fit the slimmer bill clinton. >> it did. it did. >> let's talk about the guests. everyone was wondering who woul were going to be there. there was a so-called oprah that turned out not to be the >> it does not surprise me all those celebrities, everybody was saying we'll be there. it does not surprise me they were not. they, excuse me, wanted something very intimate and they kept it that way and kept it very close with personal

people. >> there were some big names. >> ted danson, mary steenburgen. big names from the clintons' world. >> yes. >> madeleine albright signing auths. >> vernon jordan was also there. >> it does make you appreciate chelsea and her privacy a little more. she said this is what she wanted and turned out to be what she got is this is what she wanted and turned out to be what she got is the wedding. wh th >> well, we heard that it was a vegan and vegetarian feast however there was organic beef served and that's what we heard and the cake was gluten free. it was from a bakery in mt.kiksa >> she kept it traditional. a wedding of that size you do need to have some of those options for the guests. there might have even been a fish course. possibly. >> it was an interfaith marriage. we know that he is jewish. she is christian. >> correct. >> you as a wedding planner, how does something like that go about in honoring both

religions? >> it's actually not that hard. you really want to, you know -- a lot of couples get a rabbi and a minister, and you sit down and you try to bring out the personal aspects of each of you. >> it looked like they were reading personal vows to each other and they were under a chuppah. >> and a ketubah too. >> you can see the chuppah in some of the pictures. branches of trees and roses and it looked like roses over them. and they read apparently from the seven blessings, which is a jewish prayer. >> exactly. >> any idea if she's going to be keeping clinton, or is she going to be a mezvinsky or a clinton-mezvinsky? >> i don't know. have you heard that >> i haven't heard but i imagine she'll keep clinton. she seems to be very much her own lady. >> it is a famous name and does suit her well. well, thank you for joining us. >> thank you. >> we'll have you 10, 15 years for the obama girls' wedding. >> there you go. >> something to look forward. >> thank you. >> thank you. >> thank you.

>> thanks for joining us. and now we'll check with headlines from jeremy who is in for ron claiborne goo in the news this morning, a wildfire that burned almost 14,000 acres of los angeles is still threatening firefighters do say they're gaining the uppanthe fire is now 82% coned. now to what some are calling a miraculous rescue. a 10-year-old girl found alive this morning after a a three-story building collapsed in naples. and abby guerra a college student, thought to be dead in an identity mix-up after a traffic crash remains in critical condition. but her family tells abc news she is making progress. the family has set up a donation fund to help pay her medical bills. ♪ and finally a thrilling new record. michael jackson fans in wisconsin set a new u.s. record for the largest group "thriller." 1,800 people turned out for the dancing zombie event. no mere mortal can resist. that's a quick look at the headlines. now over to marysol with the weather. >> jeremy, you are very quick this morning with the lyrics. good morning, everyone. we continue to talk about the heat in the deep south and in

the southeast. take a look at these temperatures. memphis, 100 degrees. tulsa, 98 degrees. it's been like this for the better part of the week, and it just feels a lot warmer. it feels like 105, 115. speaking of 105, take a look at dallas. it's 105 today and tomorrow and tuesday. by wednesday break out your scarf, it only goes down to 104, 103, so you can >> thanks so much. >> thanks so much. this weather report has been brought to you by kellogg's nutrigrain. bill and bianna. >> when we come back here on "gma," marysol will tell us about the power of lightning. scientists trying to unravel the mysteries of one of nature's

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i tell you. no more natural entertainment than sitting on a porch watching an electric storm on a hot summer day. lightning, a beautiful and dangerous phenomenon. according to some estimates, lightning strikes cause more than $5 billion in damage each year in the u.s. alone and that's why scientists out there studying thunderstorms. marysol has more on this fascinating trend. mary. >> bill, the national geographic channel rode along with what they call lightning chasers. and they essentially go out in search of storms. they bring along lots of high-tech equipment to try to uncover the secrets to one of nature's most awesome powers. it strikes in an instant. a bolt of electricity so fast and powerful, the human eye can only capture a flicker of its true fury. because its image is so hard to capture, scientists know only the basics about how lightning works. now they're hoping new technology will help them learn more. using high-tech cameras scientists are now able to

capture the image of lightning at a slower rate and see the total duration of a flash for the first time. >> this is a high-speed camera, and this one allows me to film 2,000 images per second, and i've installed a bubble actually on the van that allows me to see different angles. >> reporter: by slowing down the lightning strikes, scientists can see that one bolt of lightning is often several distinct flashes. >> i would like to take it piece by piece and just figure out what's happening. >> reporter: and when a tall structure is involved, the flash can actually originate from the structure and not from the cloud. airplanes can also trigger lightning strikes drawing lightning from above and below as seen in this rare, amateur video. scientists are also learning more about how dangerous lightning can be. even when a storm appears far away, the electrical charges

could be closer than you think. >> unfortunately, a lot of the people or a number of the people that get struck get struck by the first or second lightning in a storm. so they don't really have any warning except to look and see that there is a dark cloud, so one needs to even be more proactive than waiting for thunder. >> reporter: lightning often strikes more than three miles from the center of a thunderstorm and sometimes even as far as 10 to 15 miles. >> if you can count the time between the thunder and the lightning, and it's less than 30 seconds or so, the lightning is closer than five miles orb so, it's time to take cover. >> reporter: at any given moment, 2,000 thunderstorms are active on earth giving the lightning chasers plenty of opportunity to chase their passion. >> i never get tired of watching

lightning. to me it's probably one of the most powerful things nature can display. to be able to see that bright light, just the thunder that comes after it is just remarkable. it's just an awesome show of what nature can do. >> reporter: it really is. and a couple of other interesting facts. 90% of all lightning occurs over land. the region with the most lightning activity is south africa and lightning almost never strikes the north and the south pole. >> i guess smokey the bear was lying when he said, only you can prevent forest fires. >> this is very true, yeah. >> those things are touched off all the time. really fascinating video. >> i didn't know they could be triggered by planes either. >> yeah. >> so to see -- we can see a lot more of this "naked science" on the nat geo channel, premiers thursday, august 5th. our thanks to them for some really great river. coming up, we float down the river through the ozarks in our "weekend window."

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i care about youfiber too. i have for while. ok, carl. why don't you care about her fiber? hey carl. [ male announcer ] fiber one. cardboard no. delicious yes. well, deep in the heart of the ozarks in arkansas, the buffalo national river flows freely for 135 miles. it is one of the few remaining rivers in the lower 48 unimpeded by dams, and it is also where our "weekend window" open this is morning in high-def. >> buffalo national river has a tremendous variety of experiences right there for the outdoors person. come in the summertime, fish,

swim, have a great time. the river is a magnificent jewel here in the ozarks. it's about 135 miles of floatable stream. >> the fact that you can go from one end of the park to the other in a canoe or a kayak makes it a pretty unique opportunity for people. >> this is a really, really neat place. there's nothing to obstruct the flow of the river, and it's entirely dependent on the natural sequence. if it rains, we get more water. if we don't, the river goes down. it's a great place to be when it is this hot. it's not so bad tipping over the canoe. you get wet, and you only have to stand up because the river is not very deep. you only have to stand up.

>> the uniqueness of the river is the peace of the river. the quiet, the solitude in the midst of a very, very busy world. but there's plenty of places upstream or downstream where you could have a real quiet time. >> i caught my first fish when i was 4 on the buffalo river. i've had my first solo boating trip when i was an early teenager. and just from the time that i was a little kid on up through now, it's just been a tremendous part of our lives. how was school today? [ girls ] good.

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want to give a shout-out to jen peron who does the "weekend window" all by herself. >> bravo. >> thank you. >> that was a good job. that was a nice one, as well. christiane amanpour's debut coming up on "this week" across

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