on this thursday night, fatal mistake. a cia drone strike overseas accidentally kills hostages including an american. tonight questions about the drone war and the two other americans kill the u.s. says were al qaeda lea. money trail. hillary clinton facing new questions about who gave big money to her family foundation and why wh secretary state. nbc news exclusive. dr. oz one on one as more physicians tonight why he says the "dr. oz show" is not a medical . and without warning. a volcano dormant for decades su erupts exp miles high. a state of emergency declar evacuations ar ordered. "nightly news" begins right now.

from nbc news world headquarters in new york, this is "nbc nightly news." reporting tonight, lester holt. good evening. it is a war seemingly without end as we were reminded today with word a u.s. drone strike targeting al qaeda militants along the afghanistan/pakistan border killed two western hostages including an american aid worker the u.s. had spent years trying to free an aid worker. their deaths happened in january but were publicly rev today by president obama. we also learned today two other americans working with al qaeda were also killed. we have two reports and start wi alexande house. peter? >> reporter: lester, good evening. the president today said that he regrets the loss of two innocent lives and that he de information be declassified insisting the victims' families deserve to truth. in an extraordinary statement, president obama toda that the u.s. accidentally killed

two hostages including an american that had been trying to free for years. >> as president and as commande take full responsibility. >> reporter: dr. warren weinstein, an aid worker maryland, was kidnapped by al qaeda in pakistan in 2011, gunmen breaking into his house. the 73-year-old grandfather appe for help captivity tw ago. >> now when i need my government, it seems that i have been totally abandoned and forgotten. >> reporter: today weinstein's wife elaine said she her fami devastated. while she insisted, quote,ho warren captive over three years ago bear ultimate . she also expressed frustration with elements of governme assistance weinstei she described as inconsistent a disappoi also killed, giovanni lo porto, an italian aid worker in 2012. the white house says both men will be comp for their loss. >> i profoundly regret on behalf of the

united states government i offer our deepest apologies to the >> reporter: cia officials tell nbc news the men were strike in the rugged mountains of pakistan. while the didn't speci order the strike the intended t high al qaed leadersh despite hundreds of hours of sur they had n information indicating the two there. it wasn't until several days ago that the u.s. g confirmed th yesterday. >> it is a cruel and bitter truth that in the fog of war generally and our fight against terrorists specifically, mistakes, sometimes deadly mista occur. >> reporter: with the government investigation now under way, new question administration's extensive use strikes and the unintended consequences. peter alexander, nbc news, the white house. >> reporter: this is

warren weinstein wasn't the only american killed u.s. dro there were two others fighting with al qaeda. the voice on this video, experts say, belongs to gadahn. >> these heroes were not 19 arm countries but rather were 19 mujahadin. >> reporter: american narrating a notorious al qaeda propaganda video of the 9/11 hijackers. born adam pearlman, his grandfather jewish gadahn was raised on a goat farm in california converting to islam in his teens, attending this mosque and getting into trouble there in the mid-1990s for his increasingly . gadahn traveled to pakistan in 1998, at first hiding his face. but he was identified by u.s. of in 2006 became the first american charged with treason since the world war ii era. >> his death, the killing of adam gadahn

is a big blow to lk lks alqaeda' operations in th. >> reporter: gadahn was their most famous american. but this man also killed may hav more d. ahmed farouk started out as an al qaeda spokesman but rose through the ranks to become their second in command in farouk was a compound where dr. weinstein an italian ai were held. an american keeping a fellow american u.s. officials say the cia didn't know it was killing any of these men, not the hostages, nor the al qaeda militants, that they happened to be in compounds linked to al qaeda that were attacked. exposing a key aspect of the administration's drone war. the u.s. doesn't always know who it's killing. lester? >> richard engel ght, thank you, richard. it's been a sad and stunning fall from grace for led american forces in two wars. retired general david petraeus who once also headed up the cia was

sentenced two years probation and fined $100,000 for sharing classified material ws one-time mistress while she was writing a book about him. petraeus gave a brief statement today turning to the race for 2016, hillary clinton under fire tonight as s on her campaign amid a slew of ne headlines that raise question dealings of her family's foundation going back to her time as secretary of state. nbc's andrea mitchell takes a closer look. >> reporter: hillary clinton, the biggest celebrity at a star-studded w conferen tonight. so when the cheering stops, clinton is trailed by a cascade of stories about whether she did favors as secretary of state r donors to h. chelsea clinton, now the foundation's vice chair, def work today >> what the clinton foundation has said is that we will be >> reporter: when she took office, hillary

clinton, pre the white agreed to a memo voluntarily di foreign contributions. but the upcoming book "clinton cash" obtained by nbc news claims she did not live up to t promise. for example, while clinton was trying to reset describes how russia's nuclear agency rosatom gained con u.s. uranium the author former george w. bush aid peter schweizer writes shortly after the rosatom deal was announced bill clinton was in moscow for a particularly compensate. he was paid $500,000 from anoth entity. and the book however hawkish hillary might have been o this one sailed through. the russian purc of uranium one was approved. the author a the apparent reversal? could it b shareholders involved in the tra had transferred approximately $145 million to the clinton foundation or its initiatives? republicans are pouncing. >> look, she's going

to have to be held accountable >> reporter: clinto strongly challenged the book today writing, hillary clinton was not invo in the state department's review of the sale to the russians and that nine a government ethics expert agree >> there gun. there's no evidence that she cha policy based on the donations to foundati >> reporter: but he and other ex that the book does establish the clintons did not live up to their promise to disclose all f donations. and on another front today, the house benghazi committee said they'll have her testify in public the week of may 18th about her e-mails and return in june to testify lester? >> andrea mitchell in our washin newsroom, thank you. that sca air we tol yesterday that forced a sky west plane to make an emergency landing in buffalo was apparently more seri it turns out not one but three passed out and more than a dozen that force

to make a safe but steep and harrowing descent. tom co. >> reporter: we now know as many as 14 people on board that united airlines sky west flight from chicago to har became ill yesterday. it started with e.r. nurse mary cunningham helping a sick passenger who had . >> she was responding, but her l. she didn't look good. we got her some oxygen. she was much mor alert. >> reporter: soon another passen fainted, attendant and mary herself became ill. >> i had t. i was shor lightheaded, didn't feel great. >> reporter: before long thr had passed out all seated in dd of the plane. many more reported being sick. >> i had a headache. i felt a lit a little t my chest. >> reporter: fearing the worst, a cabin pressure problem, the captain d rapidly from 37,000 feet down to and averted to buffalo. >> it was scary. there was a lot people with their heads down pra >> reporter: once on the ground recovered, no one went

to the hospital. firefighters, police and sky west maintenance teams examined the plane but so far have found nothing wrong. the airline says it found no evidence of an oxygen pressurization problem. what sickened 14 people and caused 3 to pass out remains a mystery. tonight sky west says that plane returning to service. tom costello, nbc news, washington. after months of delays due to partisan political fights the senate voted today to confirm loretta lynch as attorney general. the vote was 56-43 with ten republicans joining all senate de lynch will replace eric holder and become the firs african-amer to serve general. for three days a jury has l horror of the boston marathon b through vivid descriptions of those who survived it. today in the penalty phase of the trial the prosecution rested its case against dzhokhar tsarnaev offering what it calls proof that tsarnaev kne targeting children with his attack. pete williams was back

in court. nbc news >> r of the searing images from bosto officer rushing a wounded boy fr danger. just momen 3-year-old leo woolfenden was i stroller. pushed along the that's his father steven at the the scre that he's he toward a bomb. people around hi wince as the first bomb goes off a block away. just three seconds later, dzhokhar tsarnaev passes right by steven and his son nurt further proof, the government says that tsarnaev knew children victims. in court today woolfenden said lay on t left leg blo noticed injuries. i was completely terrified be didn't kno ever see m he turne 8-year-old richard next to him clearly ne. his mother please, ma bombing survivor marc fucarile who lost his right leg, says

doctors are now more than three dozen bbs from the bomb are em as for leo woolfenden, he suffered a d skull and perforated eardrum. defense lawyers begin presenting witnesses including some of his relatives, spare him the death penalty. lester? >> pete, thank in oklahoma, new revelation about the training of reserve deputy received before he says he mist shot and an internal review found concerns about robert bates going back several year. gabe gutierrez has the details. >> reporter: in 2009, the tulsa county sheriff's office launched an internal review int office's treatment of reserve deputy robert bates finding incomplete field training. colleagues reported that when confronted, bates, a p supporter and campaign contributor of the sheriffs, said anyone who took issue with his actions should

talk to sheriff stanley glanz. it concluded that bates had received special treatment. on april 2nd, bates shot and killed eric harris, a suspect in an undercover firearms sting operation. bates says he accidentally mistook his gun for his taser. >> i shot him. i'm sorry. >> reporter: t lawyers for eric harris' family are now calling on the sheriff to resign. >> the public's entitled to know the truth. the harris family is entitled t truth and they need to be transpa >> reporter: bates' attorney s h not seen the report, but in a written statement said, since 2009 mr. b received hundreds of hours of training and experience in the field. the sheriff's office acknowledges there was a 2009 i review, but a spokesman says no action was ever taken. earlier this week, sheriff glanz acknowledge that he and bates have been close frie years but insists that bates was trained. given what you know now, should mr. bates have been out there that day?

>> yes, he should have been. >> reporter: bates has pleaded not guilty to second degree manslaughter and the judge allowed him to travel to a preplanned vacation in the his next court hearing is set for july. gabe gutierrez news, tulsa, oklahoma. still tonight ou exclusive, dr. oz under fire now back at hi who says he pushes so-called quack treatments on hi show. the shy kid from the bronx out stadiums around the world. why millions enough o santos. d the world. why millions can't allergies can distract you. so when your symptoms start, doctors recommend taking non-drowsy claritin every day of your allergy season. with claritin, you get powerful, non-drowsy relief 24 hours a day, day after day. which is important because with fewer symptoms to distract you you can focus on the extraordinary things you do every single day. live claritin clear. every

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tonight dr. oz is facing new heat as more doctors come out against him, and now it's doctors from within his own hospit questions about some of the health advice he dispenses on his show. tonight, in an exclusive interv he opens up to nbc's stephanie gosk coming out swingi his critics. >> you may have seen the headlines -- >> reporter: his show dr. oz turned the tables, attacking a group from around the country who last wrote a letter insisting he b from columbia university. >> some of them have their own conflict of interest issues. and integrity ones, . >> reporter: but now more criticism. in a "usa today" posted online today five medical doctors and three ph.d.s from columbia university write, many of us are spending a significant amount of our clinical time debunking ozisms. this unsubstantiated

medicine sullies the reputation of columbia. before the editorial was published dr. oz defended t of his show in an exclusive inte with nbc n >> the show's purpose is not to medicine. the show's purpose is to talk about the good life, what you need to do to live your best. >> reporter: but as a doctor, going on a show called "dr. oz," don't people that watch your show expect that kinic medical ad? >> it's called "the dr. oz show." we very purposefully in the logo have oz in the middle and "dr." up in a little bar for. i want folks to realize i'm a doctor and i'm coming into their live supportive o but it's not a medical show. >> reporter: the argument among critic is as a doctor you shou promoting things you'd promote in your exam room, not your living room? >> i'm very respectful of my critics, and i

completely understand why you'd be much more comfortable if ever i said on television is ever that a . but that's not what . >> reporter: it does not call for oz's resignation, b authors want a disclaimer on hi stating opinions exp not be based on evidence and are endorsed university stephanie gosk, nbc news, new yo we want you to know that dr. oz will appear live tomorrow morning on" we're back in a moment with a state of emergenc sleeping giant suddenly starts roar. . congratulations. you're down with crestor. yes! when diet and exercise aren't enough, adding crestor lowers bad cholesterol up to 55%. crestor is not for people with liver disease or women who are nursing, pregnant, or may become pregnant. tell your doctor all medicines you take. call your doctor if you have muscle pain or weakness, feel unusually tired have loss of appetite, upper belly pain, dark urine or yellowing of skin or eyes. these could be signs of serious side effects. i'm down with crestor! make your move. ask your doctor about crestor.

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tonight a sleeping giant is awake and roaring. a volcano in chile dormant for 40 years suddenly exploding six miles high spewing a lot of ash and debris, some of it landing in a neighboring country. and evacuations have been ordered. nbc's miguel almaguer has our re >> reporter: in southern chile the calbuco volcano is erupting with fury. witnesses say the twin

blasts sounded like bombs, a fiery mix of lava and lightning. calbuco rumbling back to life after sitting dormant 40 yea. "there's panic, chaos and traffic jams" she says. a column of ash and toxic gas shot six miles into the air. thousands are on the move and i panic. the fallout could contaminate water and is causing concerns as far away as argenti the problem, says chile's president, is respiratory issues. the ash could also generate eir pollution. chile, part of the pacific ring of fire, is home to the second largest ch volcanoes in the world. tonight calbuco putting on an awesome display of mother nature's power, danger and raw beauty. miguel almaguer, nbc news. >> what a stunning image. when we come the latin superstar whose music video is leaving beyonce and justin timberlake in the dust. music video is leading

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make even the other famous names jealous. nbc's katy tur caught up with ro ♪ >> reporter: romeo santos isn star. he's a global sensation. from argentina to new york. where the millennial crooner sold o yankee stadium two nights in a row, the first for a latino the video for his hit "indecent proposal" has over 660 million that's more than the most popular beyonce or justin videos com >> i do get a little nervous. >> we caugh wit him before he the stage in the netherlands, of all . >> i like to describe myself more as a humble kid from bronx that, you know, is blessed to have so many fans that are so loyal and su >> reporter: born and raised in the bronx by his stay-at-home mom and construction

worker fathe was a shy kid who found his love singing at 13 in the church c. from there he started a boy band with his cousin and friend. and by 21 his band aventura made it big. >> always listen to ba and i always felt like something music like, wow, i just felt like i was going to bring something new to the table. >> reporter: and he did. taking bachata, a traditional dominican music genre about love and heartache, to the masses. today at 33, romeo knows how to play to his fans. especially the women who love him. >> they're all m juliets. >> reporter: what about the ot out there? do you worry about >> well they're not . >> reporter: one romeo, million hooked. katy tur, nb rotterda netherland we expect the crowds to start lining up early york as romeo performs

live monda "today." come on down, i might see you there. that will do it for us on this thursday i'm lester holt. for all of us at nbc news, than watching and night. news, thank you for

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