breaking news, leaving afghanistan, president biden to announce an end to america's longest war, pulling all u.s. troops out by the 20th anniversary of the september 11th attacks. the chauvin trial, the defense begins its case, but the big question tonight, will the former officer take the stand? lying in honor -- a widow's pain, the emotional tribute to capitol police officer billy evans, what the president told the officer's family. break in the case, a father and son arrested in the disappearance of kristin smart, who went missing a quarter of a century ago. radioactive release inside the japanese plant that dumped contaminated water from the wrecked fukushima nuclear plant into the pacific ocean. an heroic rescue, when a car flipped in a canal, the life- saving decision with no time to spare. this is the "cbs evening news" with norah o'donnell, reporting from the nation's capital.

>> o'donnell: good evening, and thank you for joining us. we are going to begin with what could be an extraordinary setback in the race to vaccinate americans. tonight, the f.d.a. and c.d.c. have asked states to temporarily halt giving shots of johnson &ey halt giving shots of johnson single-dose vaccine after six women who got the shot developed a rare blood clotting disorder. one of the women died. the f.d.a. says it's pausing use of the shot out of an abundance of caution while it examines any links between clots and the vaccine. it says the review will likely last just a few days. it's also worth noting that more than 7 million dollars peoplelae have gotten have gotten the j&j vaccine, gotten the j&j vaccine, making cases of the unusual reaction less than one in a million. still, tonight, the announcement is alarming for those who received the johnson & johnson shot and further stoking fears among those hesitant to vaccinate at all. dr. anthony fauci is joining us to answer your questions in just a moment. but first cbs' jericka duncan is

going to lead off our coverage tonight from new york. good evening, jericka. >> reporter: good evening to you, norah. while the occurrence of these blood clots appears to bese blood clots appears to be extr extremely rare, this pause really allows health officials to figure out what happened and also warn doctors about the symptoms. also tonight, we're learning that johnson & johnson will delay its roll-out in europe. tonight, pressing pause, americans are being turned away from the johnson & johnson vaccine, some offered pfizer or moderna instead, after the stunning announcement that six women developed a rare blood clot in the brain after getting the vaccine. >> this is a recommendation, and it's not a mandate. it's out of an abundance of caution. >> reporter: within hours, one by one, every state followed the doctor's orders. but even with millions of doses now on hold -- >> the j&j vaccine makes up less than 5% of the more than 190 million recorded shots in arms in the united states to date.a

>> reporter: the women affected also had low levels of blood platelets. their symptoms began six to 13 days after they got the shot. one woman died, another is in critical condition, and there's a striking similar later, all a striking similarity, all were of child-bearing age. the f.d.a. says they do not see a link between clotting and oral contraceptives. >> the women who developed this rare disorder were between the ages of 18 to 48. what does that tell you? >> there may be something related to hormones. we just don't understand it enough yet. >> reporter: klein with johns hopkins study the different ways men and women respond to vaccines. >> these types of events should be a call that we need to be comparing the responses and the outcomes between men and women. >> reporter: health officials say people who have received the j&j vaccine in the last three weeks should look out for symptoms like shortness of breath, abdominal pain, severe headaches and leg pain.

it could be a sign of a more serious problem. >> one shot and one shot only. >> reporter: more than 7 million americans have received the j&j vaccine, about 10 million more doses are circulating throughout the country. last month, j&j suffered another blow when 15 million vaccine doses were ruined after being contaminated at a baltimore manufacturing plant. what are the chances that this vaccine is removed altogether? >> oh, i think that's very, very unlikely. i mean, this is a very safe and effective vaccine. the chances that we'll remove this i think is extraordinarily low, and i don't think it will be warranted, based on the data we have. >> reporter: and we are just learning that the c.d.c. is now investigating the death of a virginia woman who had the j&j vaccine last month. meanwhile, pfizer is ramping up production of its vaccine in hopes of getting more doses out

sooner than expected. norah. >> o'donnell: jericka duncan, thank you. let's now bring in dr. anthony fauci. dr. fauci is president biden's chief medical advisor. dr. fauci, we're really glad you're here to help explain what this really means. people who just got the johnson & johnson vaccine are worried. what should they look out for? >> well, it depends on when they got it. it appears that this adverse event occurs within between six days and 13 days, so if you're beyond the four weeks and you've had it a month or two ago, i think you really don't need to worry about anything. if you are in the time frame of within a week or two of having gotten vaccinated, remember onen thing -- this is a very rare event. it's less than one in a milliono having said that, you still want to be alert to some symptoms such as severe headache, some difficulty in movement or some chest discomfort and difficulty breeding. breathing. >> o'donnell: these are women of

child-bearing age. does this suggest it could be hormonal? >> absolutely, and that's one of the things we want to investigate.ho there have been similar types of phenomena that have occurred during pregnancy. clotting abnormalities are known in women who take birth control pills. so certainly there could be a hormonal aspect to this. >> o'donnell: you pointed out this is less than one in a million chance that you may have this symptom. it's very, very rare. but will this fuel vaccine hesitancy? >> well, certainly that is a concern. the question that is often asked, norah, does this have anything to do with the other vaccines, the mrna's frommer vaccines, the mrna's from pfizer or moderna. absolutely not, there are no red signals coming from those vaccines, which is good news. in other words, they are very safe. >> o'donnell: already, dr. fauci, thank you. >> thank you, norah. always good to be with you. >> o'donnell: new developments to report in the shooting death of daunte wright in minnesota.

the officer who allegedly mistook her gun for a taser is resigning, so is her boss the police chief, and wright's mother is opening up about her final frantic phone call with her son. cbs' omar villafranca opens up from brooklyn, minnesota. >> reporter: days after the fatal encounter with daunte wright, two resignations and possible criminal charges. the officer and police chief tim gannon both turning in their badges. >> i'm hoping this will help bring calm to the community. >> reporter: tonight new details about potter, a 26 year police veteran. she was training another officer when wright was pulled over for an expired tag. officers discovered he had an outstanding warrant and struggled with wright as they tried to handcuff him. instead of a taser, potter pulled her pistol and fired. ( bleep ). i just shot him.

yes! >> reporter: many question how the veteran officer could confuse a brightly colored taser like the one in this photo with a much heavier and darker colored handgun. officers are trained to not look at their weapons but focus on the suspect. >> if they're reacting very quickly because there's a fast- breaking situation, they're not going to perceive the color before they actually fire the taser. >> reporter: in the last 20 years, there have been 18 cases0 years, there have been 18 cas where an officer confused their weapons and fired at suspects, five died, two officers have been charged. wright's mother told supporters that she was on the phone with the woman in candidate's car the woman in daunte's car moments after the shooting. >> and it was on a facetime, and she said, and he was crying and screaming and she said that they shot him, and my son was laying there unresponsive. that's the last time that i seen my son. >> reporter: there is a curfew in effect in minneapolis and st.

paul but not here in brooklyn center. paul and here in brooklyn center. you can see behind me there are several hundred protesters that say they plan to be here for a while. the washington county district attorney, the d.a. that will be in charge of the case says he will decide by tomorrow if criminal charges will be filed against potter. norah. >> o'donnell: possible criminal charges, all right, omar villafranca, thank you. and just a few miles away in minneapolis, derek chauvin's murder trial has reached a key point, after 11 days and 38 prosecution witnesses, the defense is now trying to convince the jury that chauvin did nothing wrong, and that george floyd died because of his drug use and health problems. here's cbs' jamie yuccas. >> reporter: today the prosecution rested and the defense immediately began building its case, calling on use offer force expert barry brodd. >> i felt that derek chauvin was justified, was acting with objective reasonableness. >> reporter: defense attorney eric nelson addressed head on derek chauvin's decision to keep george floyd handcuffed and

prone, kneeling on his neck for more than nine minutes. >> in your opinion, was this a use of deadly force. >> it was not. police officers don't have to fight fair. they're allowed to overcome your resistance by going up a level. >> reporter: but during cross- examination, the prosecution wasted no time in questioning brodd's judgment. questioning bro >> what part of this is not compliant? >> so i see his arm position in the picture that's posted. >> right. >> reporter: that a complaint person would have both their hands in the small of their back and be resting comfortably, versus like he's still moving around. >> did you say resting comfortably? >> reporter: the defense contended heart disease and illicit drugs killed george floyd, not use of force by chauvin. >> open your mouth, spit out what you got, spit out what you got! >> reporter: defense played this police body cam video of a 2019 arrest of george floyd saying how he could be affected by opioid. scott creighton, a former narcotics investigator with the minneapolis police department was the arresting officer.

>> the passenger was unresponsive and non-compliant. >> reporter: still, floyd ultimately complied with police. >> i apologize, man. >> reporter: the majority of jurors were paying very close attention to testimony today and were seen taking lots of notes. the defense is expected to move on to medical experts, but there is still no word whether chauvin will testify on his own behalf. norah. >> o'donnell: jamie yuccas, thank you. now, here to washington, major announcements coming from the president. tomorrow, america's longest war is coming to an end in a matter of months. a war that cost the u.s. more than 2,000 lives and taxpayers trillions of dollars. cbs' weijia jiang has more from the white house. >> reporter: president biden's decision to withdraw all american troops from afghanistan is notable for the deadline he chose, september 11, the 20th anniversary of the attack that brought them there in the first

place, to track down osama bin laden. mr. biden had recently hinted that he would make this move, frustrated with a war that is now in its third decade. >> we will leave.ade. >> we will leave. the questi the question is when we leave, but we are not staying a long time. >> reporter: the trump administration made a deal to withdraw the 3,300 troops currently there by may 1, but the president thought that was too soon. the white house said by september, al quaida would no longer pose a threat to the u.s. homeland. republicans slammed the decision. >> precipitously withdrawing u.s. forces from afghanistan is a grave mistake. >> reporter: afghan officials, fearful of a resurgent talibanfe told cbs news a civil war was inevitable. tensions are rising on the border of russia and ukraine and in crimea vladimir putin's

forces have mobilized over 40,000 troops. >> the size and scale is of great concern. >> reporter: in a phone call wit putin today, president biden called on moscow to de- escalate and proposed a summit in the coming months. also tonight, a new threat from iran, the regime has announced plans to increase uranium enrichment following a cyber attack at a nuclear plant likely by israel. the white house called the announcement provocative but said the u.s. remains committed to reaching a nuclear deal with iran. norah. >> o'donnell: weijia jiang, thank you. and we have an update tonight on a story we have followed extensively. listen to this: the f.d.a. plans to propose limits on arsenic, lead and mercury in baby food, following a congressional report that found some baby foods are tainted with toxic heavy metals. right now the government does not regulate most toxic metals in infant and baby foods. looks like that change is now coming. it's an emotional night at the u.s. capitol. a departure ceremony held to honor capitol police officer

billy evans killed in the line of duty earlier this month. earlier today president biden had a special message for his family. here's cbs' nikole killion. >> reporter: a final absolute to >> reporter: a final salute to u.s capitol police officer william billy evans. >> he became a martyr for our democracy. >> reporter: the ultimate honor for the 41-year-old father of two who loved playing lego and lightsabers came from his 9- year-old son logan, donning a police cap, clutching his teddy bear. 7-year-old daughter abigail wiped away her mother's tears. >> losing a son, daughter, brother, sister, mom, dad, it's like losing a piece of your soul. but it's buried deep, but it comes back. >> reporter: the 18-year veteran is the second capitol police officer killed in the line of duty since the january 6 riot. he died this month after a car

rammed into a security barricade, the pain still fresh for surviving officer ken shaver, coping with yet another loss in a force struggling to heal. nikole killion, cbs news, the capitol. >> o'donnell: and outside of the u.s., nowhere in the world has the pandemic been deadlier than in brazil, where they are now digging graves around the clock. one of the most concerning variants of the virus has spread across the country, andss hospitals are overflowing. cbs' manuel bojorquez is there tonight. >> reporter: inside this hospital in sao paulo is like so many in brazil, beyond the brink. >> these are your most sick patients. all intubated, all covid and all in very critical need of care here.

>> reporter: dr. daniel de jesus has been on the front lines for more than a year now and this is the worst she's seen it. drive, she believes, by a variant thought to be more contagious. in your experience, how many of these nine people in this one room will recover or not? >> less than half will recover. >> reporter: these doctors an nurses just keep doing what they do, they have no other option. here in brazil, there have been nor than 3,800 deaths in the last 24 hours. manuel bojorquez, cbs news, sao paulo. >> o'donnell: and there's still much more news ahead tonight on "cbs evening news." breaking tonight, new arrests in the disappearance of kristin smart some 25 years ago. and the new japanese plan to geo rid of waste water from a nuclear disaster, why critics are warning of an environmental disaster. al disaster.

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>> announcer: this is the "cbs overnight news." i'm ed o'keefe in washington. thanks for staying with us. health officials in new york, ohio and other states say they'll stop distributing the johnson & johnson coronavirus vaccine as the cdc warns it may cause blood clots. six women have developed rare but dangerous clots about two weeks after taking the jab. and one of them died. so far nearly 7 million doses of the j&j vaccine have been administered in the u.s. meanwhile, the virus continues to rampage through many countries. and the worst is brazil. the country's bracing for its deadliest month yet with deaths expected to top 3,600 a day.

manuel bojorquez reports from sao paolo. >> reporter: in one of the reasons the world is so concerned about what's happening here in brazil is the more the virus spreads the more it can mutate. as you mentioned, it's already happened here with the p-1 variant, which is believed to be more contagious, and in this country's most densely populated areas social distancing is practically impossible. this is paraisopolis, sao paolo's second largest favela, the name given to sprawling low-income neighborhoods often in the shadows of wealthy enclaves. life was plenty tough here before the pandemic. but the virus has amplified the a crippled economy means food insecurity affects more than half of brazil's population. antonio told me if he didn't accept these community meals he'd worry how he'd get money to eat. if you did this, meaning robbing people would be the other option. because there's no opportunity.

>> mm-mm. >> in this worst moment i try to give the best of myself to the other people. >> reporter: marcos desantos works for the non-profit hands of maria that delivers about 3,000 lunches here every day. >> it's the responsibility of the government that don't take care of the people. >> reporter: so the government yo feel has not taken care of the people here? >> no. >> reporter: president jair bolsonaro has been criticized for blatantly ignoring science and refusing calls for lockdowns. here in sao paolo some restrictions were actually lifted on monday, allowing sports games to resume without crowds and food pickup at bars and restaurants. consider this. last week one out of every four covid-related deaths worldwide happened here in brazil. cemetery workers now turn soil around the clock. the burials are happening one right after the other. in the short time we've been here we've