diane? >> yes, there is caution in the days ahead, but thank you, terry. and as we just heard, proud to be an egyptian there in tahrir square. >>> and, we want to show you an image that caught our eye today, because the view from space has been focused on this particular square, take a look, earlier this year. and then, there it is, from way up in space. for 180 miles up, the sea of humanity. and, every person in that crowd has a story, a reason for being there, for celebrating tonight. and jim sciutto has also been in that square. jim? >> reporter: diane, tonight, the mood in the square is electric. it's invigorating and hasn't faded one bit since they heard the news. there is no end in sight tonight to the celebration here or to this movement. this is the very instant when the exhilarating news reached the square. soldiers, on the balcony, signaling down to the crowd that the president was gone. we were speaking to mohammed, who, at 30, had lived every day of his life under mubarak until t

diane? >> we will be back to you later in the broadcast, christiane, thank you. >>> of course, there are thousands of american, so many of them tourists and students, racing to get out of egypt tonight. more than 1,200 were evacuated on flights today running low on food and water in an airport scene that promises to play out for days to come. abc's lama hasan has some of their stories. >> reporter: the first evacuees have started arriving in athens, istanbul and cyprus on charted flights organized by the u.s. state department. >> it's nice to be out of egypt right now. >> reporter: but they are the lucky ones. thousands remain in standstill traffic or stranded at the airport. >> it's complete chaos in the airport. >> reporter: in cairo at 6:00 a.m. this morning, hudson smith and his son were packing up desperately trying to get home to atlanta. >> it's been kind of crazy so it's time for us to get on a plane and go home. >> reporter: the airport ride isn't an easy one. >> even if you have a

>> reporter: good evening, diane. there are reports of thousands of gadhafi's mercenaries have massed around tripoli, and are ready to move in to defend it. we're hearing that pro-gadhafi forces have set out to destroy some of libya's precious oil fields. it appears that gadhafi and his country are unraveling. the message that met us as we crossed into libya today, graffiti that reads, hand by hand, down with crazy gadhafi. a large part of this country now firmly in the control of the protesters. we're about 15 minutes inside the libyan border and we've been stopped at several checkpoints where they've been asking for our passports. but it is civilians who are doing the asking. there isn't any military or police in sight. those we spoke to saga d say ga has failed them. "people need everything," this man said. there are no hospitals, no medicine, no jobs, no food." >> he only did one thing. he tried to catch the authority, he tried to catch the oil. he just thinks himself as a leader for africa, but he is nothing. >>

diane? >> alex, thanks to you. to dance and sing. and as alex just pointed out, the u.s. has to find a way to fathom this mind of this increasingly bizarre dictator on the ropes. and jake tapper is at the white house tonight to tell us how the white house is dealing with him. >> reporter: administration officials fear that even for a dictator known for eccentricities, gadhafi has become so untethered from reality, he may, quote, burn down the house with him. as one official put it. >> this is very much a man who has a kind of an apocalyptic vision of how politics takes place. >> reporter: this week, gadhafi said protesters in his country were being fed hallucinogens by osama bin laden. according to a psychiatrist who worked for the cia for 21 years, that's because it's inconceivable to gadhafi that libyans would oppose him. >> we're hearing this paranoid, besieged language from him, as he's trying to find an explanation for how his people who love him so could possibly turn against him. >> r

that's what diane wrote on face book. and sylvester wrote, bring it on, diane sawyer. your next gig will be hosting "good morning emergency room." obviously, all in good fun. that's funny. watching two legends go at it. >> i wonder what she'll close "world news" with today? >> getting fierce. i put my money on diane. as you would, too? >> you know it. >> josh brolin slams john travolta and his scientology beliefs. this played out in "the new yorker." basically what happened is he's talking about scientology. and he says, there's a brief period in his life when he went to the celebrity center in los angeles and took part in an auditing session. he says he was then included in a dinner party where john travolta and marlon brando were guests. here's where it gets a little weird. he says brando just arrived with a painful cut on his leg and brolin says travolta was like, let me help. he said he basically watched him put his hands over the guy's leg. he watched him put his hands over the guy's leg. it got very physical. he said travolta said i just reached a new level in sc

>> reporter: good evening, diane. here on lake shore drive, more than 200 cars remain stuck in the snow and the city is coping with a blizzard for the record books. at daybreak, lake shore drive, usually so lovely, looked like an apocalyptic movie set. mile after mile, nearly a thousand cars stuck in snow so deep they could not possibly escape. in this section of lake shore drive, just a mile north of downtown, we've come across hundreds and hundreds of trapped cars, as far as the eye can see. we checked for stranded motorists and found jaco collins. he'd come back after spending most of the night trapped in his truck. how long were you inside? >> i was inside with my neighbor next door right there for almost seven hours. >> reporter: the monster storm roared in at rush hour like a winter hurricane. multiple accidents backed up traffic, so cars, trucks, even city buses were trapped. some ran out of gas. what was it like? >> cold and everybody was trying to stay huddled in their cars. >> reporter: all night long, firef

>> reporter: good evening, diane. i have to say, the chaos and confusion that so permeated throughout egypt made its way to the white house today. you're right, president obama seemed jubilant when he made remarks earlier today, talking about how we were witnessing history. although he did not want to get ahead of what president mubarak was going to announce. and later came the news that president mubarak was not taking president obama's advice and including opposition leaders and and he was not taking over concrete measures, lifting the emergency law immediately, as president obama has asked him to do. so, i have to say, though the white house right now is poring over mubarak and vice president suleiman's statements, trying to figure out what went on tonight, there is no concrete reaction. they are still trying to make sense of it, just like the crowd in tahrir square. >> it is telling, jake. our thanks to you. and we want everyone to know we will be reporting on "nightline" later tonight with a wrap-up of today's ev

diane? >> it's a question about the reality and whether the reality is perceived or not, christiane. would you say, at this point, they think they're going to weather this? >> reporter: i feel that from what they told me, they think they're going to be able to weather this. and furthermore, the vice president told me that this is not tunisia. in other words, the president of tunisia was forced to flee. but the president of egypt would not be forced to flee. diane? >> christiane, thank you. and again to the formidable bravery and reporting of our team over in cairo, thank you, again, and to all of them. and we'll be back with you at the end of the broadcast. >>> and by the way, you should know that christiane was inside just now because security said it was too dangerous to broadcast outside. and you can see a lot more of her exclusive interview with president mubarak and his vice president suleiman tonight on a special one-hour edition of "nightline." >> you but we want to go straight to the

diane? >> okay, jake, thanks to you. >>> and we turn next tonight to the special "world news" interview. former secretary of defense donald rumsfeld finally speaks more than four years after leaving public life addressing questions about two wars started during his time at the pentagon, wars courageous men and women are still fighting today. he has written a new book, and it makes his case that any perception of american weakness emboldens enemies, and even though he has been out of office four years, at 78 he still has volcanic energy and the demanding style reminiscent of those famous pentagon duels with the press. >> i've answered that question 15 times. >> i don't have any idea who said what you said they said or even if they said what you said they said although i'm quite sure you think they said what you said they said. >> reporter: formidable, combative. the title of donald rumsfeld's memoir "known and unknown" is based on one of his famous lectures to a confounded press. >> as we kno

>>> good evening, diane. beneath that storm, you can see there's every weather extreme. from extreme weather and tornadoes in the deep south to these blizzard warnings in nine states. and yeah, there is everything in the middle. >> it's a historymaking monster storm that has officials warning the 100 million americans in the cross hairs to take precautions. >> this is a storm that is huge. there are many areas of this this storm and saying it's not that bad and we're saying it's not that bad yet. this storm is still moving. >> reporter: fema is mobilizing generators and supplies for emergency shelters throughout the midwest and in four states governors have declared states of emergency. and illinois and missouri are among the states that have called in the national guard to battle this epic storm. there are two sides to this fast moving storm. on the north side, arctic air will create heavy snow, dumping up to three feet in some spots. on the south side of the storm, warmer temperatures will mean sleet and freezing rain. leaving ice across the midsouth and parts of the m

alex, good evening. >> reporter: good evening, diane. we spent the day with opposition protesters here in eastern libya. they feel emboldened tonight, like they are on the cusp of taking down this dictator after his four decades in power. and for many of them, there's no turning back. the people here are growing in power and courage. taking the battle to gadhafi's special units and foreign mercenaries in city after city. in eastern libya, a protester took the wheel of this armored vehicle. crowds lifted weapons to the sky. meanwhile, gadhafi continues to see top officials defecting. tonight, one of his closest aides and his cousin is asking for asylum in egypt. so, gadhafi took to the air waves today, phoning into libyan tv with another rambling diatribe, accusing the u.s. and al qaeda of fermenting the uprising against him. he said the young protesters were given drugs by osama bin laden, that something was slipped into their coffee. so, who is in control of his country tonight? most libyans live near the coast. and throughout the east,

>> good afternoon, diane. i spoke for about 30 minutes with president hosni mubarak in a reception room at the palace and i asked him what he thought now that he's promised to leave office and not stand for re-election. he told me that i am fed up after 62 years in public life, i have had enough, i want to go. but he added, if i resign today, there will be chaos. he said that he had told that also to president barack obama. he told me, quote, obama is a very good man, but i told obama, quote, you don't understand the egyptian culture and what would happen if i stepped down right now. he said, again, there would be chaos, and he said the mosm brotherhood would take over. when i asked about his supporters causing violence against the protesters in the square, he told me i was very unhappy about yesterday. i do not want to see egyptians fighting each other. diane? >> did he give you any sense of what he would do to contain the violence? >> he said that there would not be force. actually, i was there in the presid

>> reporter: good evening, diane. what seems like a direct conflict between american national security interests and american ideals. today the u.s. government condemned the loss of life as protests in bahrain. but the secretary of state made clear that the u.s. alliance with that regime is solid. >> bahrain is a friend and an ally and has been for many years. >> reporter: bahrain is home to more than 4,000 u.s. military personnel at the only u.s. naval base in the region. it's also home to the navy's fifth fleet. >> we have advised all our sailors to avoid the sites where the protests are occurring. >> reporter: for decades those sailors have been there to protect u.s. interests. including the world's most important choke hold, including access through the strait of hormuz. 19% of daily oil imports to the u.s. come from the middle east. across the middle east, the administration says, the u.s. government relies upon arab regimes that are the target of those protests. yemen is led by a regime that allows the u.s. to t

diane sawyer goes head to head with donald rumsfeld in a tv first. the former secretary of defense opens up as never before. the controversy, the war, the wmds and the big question, what did he get wrong? >>> plus, the man whose public face has been stoney defiance gets emotional for the first time about his private trials at home during his tenure at the pentagon. an eye-opening surprising interview starts right now. >>> good evening, everyone. aisle bill weir. every war has its own signature images and when it comes to iraq and afghanistan, the sight and sound of donald rumsfeld at the pentagon podium is woven into american history. his defiant management of those wars made the former secretary of defense one of the most polarizing political figures of the post-9/11 age but in this his first television interview since 2006 you will see donald rumsfeld as never before. he reveals a tender side and valuable insight into the decisions that have so many young americans still in harm's way tonight. here with the world exclusive is diane sawyer. >> i've

>> reporter: diane, tonight, the egyptian government has issued a stern new warning. these protests can't continue, and the regime won't end. but what we saw out there, as you pointed out, was just this surging, cresting, new wave of energy. they aren't listening to the politicians anymore. they're listening to their own leaders now. for the first time, the egyptian revolution came to the country's parliament today. as nervous soldiers and officials looked on, thousands of egyptians with a boldness that would have been unimaginable in this country just a couple of weeks ago brought the simple, shining, shouted demand of this revolt directly to the gates of power. >> we need freedom. freedom! freedom! >> reporter: it was as if the protests caught a second wind. and downtown cairo was once again transformed. countless thousands thronging the streets, streaming across the bridges and filling liberation square. >> hey ho, hey ho, mubarak has to go. >> reporter: president mubarak staged another photo op today -- a diplomatic meeting. but the crowd, the real power here righ

>> reporter: good evening, diane. well, in his $3.7 trillion budget proposal, the president promises pain. university of colorado junior derek dash pays tuition with help from the pell grant program for low-income students, and he was planning on enrolling in summer classes. >> the credits that we're receiving then are credits that are just as good during the spring or fall. >> reporter: but in his 2012 budget, president obama proposes eliminating pell grants for summer classes as well as charging more for graduate student loans. that would save the budget $89 million over 10 years. bad news for dash. >> if pell grants weren't available to me, i'd probably be taking out student loans right now and be incurring some debt. >> reporter: that's one of the tough choices president obama says his budget makes. >> if we're going to walk the walk when it comes to fiscal discipline, these kind of cuts will be negligence. >> reporter: another painful cut, $2.5 billion from a program providing home heating assistance for the poor

. >>> all next week here on "world news" with diane sawyer, made in america. we're going to begin with a simple question for us all. look around you at your home tonight. how much of what you see in the living room, bedroom right now was entirely made in america? and what difference would that make when it comes to american jobs? >> join "world news" as we set off on a kind of challenge. >> you have heard diane in recent days with our countdown to "made in america." after all, it has been the american workforce that has pulled us out of nearly every economic downturn we have faced as a country. after world war iii it was american ingenuity filling countertops with appliances, and back then, for every ten things americans bought, only one was bought overseas. today, more than half of what we buy is overseas. we found an american home and looked for anything not made in america. anything not made in america had to be removed. and even as we were flying, we had to wonder, what are we flying in? we landed in dallas, and the plane was a boeing, so at least we got h

and diane, we now know she's getting her appetite back, eating three meals a day. and she's actually gaining weight again. >> sometimes just the word toast is a victory. >> reporter: that's correct. >> thank you, bob woodruff for reporting tonight. >>> and, we'll turn now overseas to egypt, where our terry moran spent the day with protesters in the birthplace of the revolution, tahrir square. and sends word that protests are giving way to striking workers. thousands of government workers from factories to hospitals, flexing collective muscle, demanding democratic change. and someone is here who led the way with her reporting from egypt, christiane amanpour is back with us tonight. it is great to have you back with us. everyone still worried that this impasse is going to blow. fear that there is a rumor that there's going to be a crackdown? you've been making calls, what have you heard? >> reporter: talked to a senior egyptian government official. this boils down to a word that the vice president used, we won't tolerate this anymore. i'm told that it's not about cra

>> reporter: hi, diane. earlier from the oakland hills, we saw the rain coming down. we even saw snow in the berkeley hills this afternoon. now it's all cleared up and the rain stopped just in time for the chinese new year's parade. loud snaps of firecrackers go off as tens of thousands line the wet pavement in san francisco's chinatown. >> we're just out here to watch the parade. >> reporter: watching the parade, despite the blustery wind and soggy cold. >> it's cold. and there's a parade happening right there. look right over there, there's a parade. >> reporter: billed as the largest chinese cultural event held outside of china, it did not disappoint. >> the rain stopped soonas soon the parade started. >> reporter: throughout saturday the downpour drenched most of the region, toppling down trees like this oak in front of a fraternity house in front of uc berkeley and slowing down local roadways. >> there's a lot of cars, and people are busy with a holiday weekend. >> reporter: but the wet and chilly weather brought in a special holiday weekend surprise. snow covere

diane? >> bob, good to have you reporting from houston tonight. >>> and still ahead, the news about jobs in america. can turn romantic anytime.nt and when it does, men with erectile dysfunction can be more confident in their ability to be ready with cialis for daily use. ♪ cialis for daily use is a clinically proven low-dose tablet you take every day so you can be ready anytime the moment's right. ♪ tell your doctor about your medical condition and all medications, and ask if you're healthy enough for sexual activity. don't take cialis if you take nitrates for chest pain, as this may cause an unsafe drop in blood pressure. [ man ] do not drink alcohol in excess with cialis. side effects may include headache, upset stomach, delayed backache, or muscle ache. to avoid long-term injury, seek immediate medical help for an erection lasting more than 4 hours. if you have any sudden decrease or loss in hearing or vision, stop taking cialis and call your doctor right away. [ male announcer ] ask

diane, thanks for your insights and covering the story. diane he'sabrook. >> susie: here are the stories in tonight's "n.b.r. newswheel." it's lucky seven for the blue chips; they rose today, marking their seventh straight session of gains. the dow rose 71 points, the nasdaq added 13, and the s&p 500 up 5.5. shares moved on the n.y.s.e., and 1.8 billion moved on the nasdaq. china hiked a key interest rate today, the third time since october. its central bank is trying to cool a red-hot economy and keep inflation under control. and here's a positive for the u.s. recovery: business travel is finally taking off again. u.s. companies are expected to spend about 5% more on travel this year. they spent $230 billion last year. still, experts don't see a return to normal corporate travel levels for another two years. >> tom: still ahead, the beginning of the food chain. tonight's "word on the street" takes a look at where a.g. begins, with under the radar plays in fertilizer, seeds and farm equipment makers. >> susie: more insider trading charges

good evening, i'm diane dwyer in tonight for jessica aguirre. >> and i'm raj mathai. finally seems like winter weather again. the bay area is on storm watch. rain, wind and a messy forecast. and it's barrelling toward the bay area as we speak. let's bring in chief meteorologist jeff ranieri. how much? >> the second round will be arriving. the storm door completely open right across the west. as we zoom in, what we'll find is the beginnings of rainfall right off the northern california coastline. that is round two of this second more powerful system that will start rainfall here across the bay area as we head into tuesday morning. so what can you expect? for that morning commute, periods of rain. winds 15 to 20. and possibly a half inch to an inch of rainfall as that rain increases throughout the day. and anyone traveling to the sierra, treacherous traveling continues with potentially one to two feet of snow and winds that could top 60 miles per hour. we'll have your hour-by-hour rain forecast coming up. >>> and our continuing storm coverage anytime online at nbcbayare

i'm diane dwyer. we have new information tonight about the search for the man who kidnapped and killed a 4-year-old boy from the central valley town of patterson last month. detectives say they found the body of a man this morning floating in the delta men dote a canal. these are live pictures of the scene. the description of the body matches that of the suspected kidnapper jose rodriguez. an autopsy on the body is scheduled tuesday. rodriguez snatched 4-year-old juliani cardenas a month ago and drove into the canal. juliani's body was found earlier this month. about 1,000 people gathered for a memorial service for the little boy. >>> san francisco police found a 65-year-old man dead inside his home on knob hill, and tonight they say they are searching for his killer. police received a call last night asking them to check on the man at his apartment on bush street near jones in the lower knob hill neighborhood. officers arrived and found the 65-year-old man dead with signs of trauma to his body. neigh

looking at a lot of moisture coming in off of diane. in east asia, we're going to see a little bit of snow for western china today here and then southern areas, too, will see rain spreading in, again from the south china sea. japan this morning looking at pretty heavy showers for central and northern sections of the country. but that's going to be heading out at a pretty good pace. should be looking drier into the evening. as for highs, 14 in tokyo today. 6 in seoul. 18 degrees in taipei. now for north america, it is pretty messy again out towards the west. systems continuing to trek on in and talking about a lot of snow in to friday night. widespread area of intermountain west, rockies and western canada picking up the snow. the sierras in particular seeing the heavier snows. 15 centimeters or more possible here and the snow area for eastern and central sections of canada, too, and some of this parts of ontario expect 15 centimeters of or more of this heavy stuff, as well. great lakes area, though, you won't be looking at too much snow

in tonight's "all in the family" series, diane eastabrook introduces us to the darleys, a family that says being successful means thinking ahead. ( siren ) >> we are not the ones going into the burning building. but we are the ones that support them. >> reporter: w.s. darley and company outfits firefighters around the world with everything from trucks, to pumps, to coats and boots. it's a 100-year-old business run by more than a dozen family members in two states. >> this is jim darley, who heads up sales for our fire pump division. >> reporter: president and c.e.o. paul darley heads the corporate office in itasca, illinois. >> this is going to nanching, china. >> reporter: cousin jeff darley runs the factory in chippewa falls, wisconsin. the family got into the fighting business in 1908, when william s. darley began supplying communities with water, sewer and fire-fighting equipment. in the 1920s, darley built the company's first fire truck on a model t ford frame. he later rolled out a centrifugal fire pump used widely by the military during world war two. in the 1950s, son bill joi

diane eastabrook reports. >> reporter: chicago's gritty south side is an area few large banks serve. but some of wall street's heaviest hitters, including wells fargo and j.p. morgan chase, are behind urban partnership bank. the bank opened last summer after big lenders put up roughly $145 million in capital for the assets and deposits of the failed shore bank. shore bank was a chicago institution for more than 30 years. urban partnership's leaders, william farrow and david vitale, call the new bank a win-win for the community and the big banks. >> the customers we serve have to be served by somebody, and you don't want to go back to the '70s or '80s when it took the government to force that to happen. but they would certainly have gotten encouragement to come in and serve these communities one way or another. >> reporter: in the past couple of years, more than 300 u.s. banks have failed, collapsing under the weight of bad commercial and residential real estate loans. most, like shore bank, were community banks with assets under $10 billion. about half of the loan portfolio urban par

hello, kimberly. >> reporter: hello, diane. even with some financial instability, it seems the tradition of buying gifts and going out for dinner for valentine's day isn't wavering at all. and local businesses are reaping the benefit. feeling the love as cupid's arrow hits the hearts and pocketbooks of consumers. the national retail federation estimates the average adult plans to spend $116 on valentine's day gifts. that's up nearly 13% over last year. about on average what would you say you're spending tomorrow? >> i would say around 200. >> i would say 150. >> reporter: while some people we talked to claim valentine's day is a holiday made up by greeting card companies, many say they relish in the romance of it all. >> we love it. >> we love valentine's day. >> we love it. it's our anniversary. we're not only buy for ourselves, we also buy for our grandkids. >> reporter: and business owners are happy to oblige. >> valentine's day is our number one holiday. >> reporter: at city florist in the south bay, things are looking rosy

hello, stephanie. >> reporter: hi, diane. how are you doing? you know, we're doing great out here today. we're starting to see several people sort of filting out of the governor's ball. that was where they went after the awards ended. during the show, there were really no major surprises. most of the people who were expected to win, did win in terms of the pictures. there were ten contenders for best picture. but many critics say it was really between two films, the king of social networking versus the king of england. >> "the king's speech." >> reporter: a film about a stammering monarch earned a place among hollywood royalty sunday night. "the king's speech" won four academy awards, including best picture. >> to have been part of a film that touched all around the world has been a huge privilege. >> reporter: the film's star colin firth earned best act for his role as king george vi. >> reporter: the film took top honors for best original screenplay and best director for tom hooper, who saluted his lead actors. >> i'm only here because of you

>> reporter: good evening, diane. well, hours after president obama said he wanted to work with republicans to reduce the nation's deficit, he threatened to veto a republican bill for cutting spending too much. it all illustrates just how difficult it will be to find common ground to reduce the nation's $14 trillion debt. president obama today said the republican spending cuts are too harsh. >> let's use a scalpel, let's not use a machete. >> reporter: his veto threat came on paper this evening, hours after he suggested real disagreements with house republican leaders. house republicans, as you know, want to start cutting now, cutting this year's budget. >> i think it is important to make sure that we don't try to make a series of symbolic cuts this year that could endanger the recovery. >> reporter: but the president did not issue his veto threat on camera then, as he could have. he wanted the message of the press conference to be that he's ready for an adult conversation with republicans about reducing the deficit a

[applause] and after the moscony years, it was diane feinstein. and her husband, richard blum, is here. they actually got married in the chambers upstairs. [applause] now, in just a minute, the president of the board of supervisors is going to say the words that will allow you, the public, to know what the vote was in his chambers earlier in the afternoon. but mr. lee, there have been several people from across the bay, from sacramento and other places, who are here to extend their warm welcome. standing next to you is mayor newsom's chief of protocol, my chief of protocol, diane's chief of protocol, everybody's chief of protocol, who's ever had a chief of protocol in san francisco, charlotte schultz. and i hope she sticks around as your chief of protocol. [applause] one of your state senators, and we have two of those, only one is present at the moment. the other one is up working on the budget. but senator leland yee is here to welcome you. [applause] and a man who went to bed on saturday night, a cop with a badge and who woke up on sunday morni

i'm diane dwyer. >>> for dozens of families in san bruno, this past week brought up some terrible memories. as two pipeline ex lotions rocked parts of the nation. tonight there are new questions about the safety of the millions of miles of pipelines running under our neighborhoods and our cities. monte francis is in san bruno tonight with the story for us. >> reporter: diane, people here in san bruno are rebuilding and trying to move on following the events of last september. this week brought new tragedies and new doubts about the safety of pipelines nationwide. >> oh, my god, this is beyond belief. >> reporter: the gas line explosion late thursday night shook the town of hanoverton, ohio. it followed a horrific scene in pennsylvania just a day earlier. >> i heard this awful bang. and i thought my roof fell down. >> reporter: five people were killed after an 83-year-old underground gas main exploded, damaging or destroying 47 homes and businesses. the cause is still under investigation. meanwhile, federal investigators have determined the cause of the explosion in san bruno last september