From nbc news World Headquarters in new york this is nbc nightly news. 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 bo killed two western hostages including an american aid worker the u. S. Had spent years trying to free and an italian aid worker. Their deaths happened in january but were publicly revealed today by president obama. We also learned today two other americans working with al qaeda were also killed. We have two reports and start with Peter Alexander at the white house. Peter . Reporter lester goodevening. The president today sa that he deeply grets the loss of two innocent lives and that he demanded the information be declassified insisting the victims families deserve to know the truth. In an extraordinary statement, president obama today confessed that the u. S. Accidentally killed two hostages including an american that had been trying to free for years. As president and as commander in chief, i take full responsibility. Dr. Warren weinstein, an aid worker from maryland was kidnapped by al qaeda in pakistan in 2011 gunmen breaking into his house. The 73yearold grandfather appealing for help while in captivity two year ago. Now when i need my government it seems that i have been totally abandoned. And forgotten. Reporter today weinsteins wife elaine said she and her family were devastated. While she insisted quote, those who took warren captive three years ago bear ultimate responsibility. She also expressed frustration with elementsf the u. S. Government whose assistance during weinsteins captivity she described as inconsistent and disappointing. Also killed giovanni lo porto, an italian aid worker kidnapped in 2012. The white house says both mens families will be compensated for their loss. I regret what happened. On behalf of the United States government i offer my deepest apologies to the family. Reporte the men we killed in a drone strike in the rugged mountains of pakistan. While the president didnt specifically order the strike the intended target was high al qaeda leadership who, despite hundreds of hours of surveillance they had no information indicating the two hostages were there. It wasnt until several days ago that the u. S. Government confirmed the deaths and the president call the weinsteins yesterday. It is a cruel and bitter truth that in the fog of war generally and our fit fight against terror specifically mistakes sometimes deadly mistakes can occur. Reporter with the government investign n under way, new questions over the administrations extensive use of drone strikes and the unintended consequences. Peter alexander, nbc news the white house. This is richard engel. Warren weinstein wasnt the only amer killed in the u. S. Drone strikes. There were two others fighting with al qaeda. The voice on this video, experts say, belongs to adam gadden. These heroes were not 19 armies from 19 countries but rather were 19 mujahadin. Reporter an american notice g a notorious propaganda video of the 9 11 hijackers. Born Adam Pearlman hi grandfather jewish he was raised on a goat farm converting to islam in his teens, attending this mosque and getting into trouble there in the mid1990s for his increasingly extreme views. Gadden traveled to pakistan in 1998 at first hiding his face. T he was identified by u. S. Officials and in 2006 became the First American charged with treason since the world war ii era. His death, the killing of adam gadden is a big blow to al qaedas operations specifically in the recruitment of westerners. Gadden was their most famous american. But this man also killed may have been more dangerous. Ahmed farouk rose through the ranks to become their second in command in pakistan. Farouk was at the same compound where dr. Weinstein and the italian aid worker were held and keeping a fellow american hostage for al qaeda. U. S. Officials say the cia didnt 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 administrations drone war. The u. S. Doesnt always know who its killing. Lester . Richard engel tonight, thank you, richard. Its been a sad and stunning fall from grace for the man who led American Forces in two wars. Retired general David Petraeus who once also headed up the cia was sentenced today for two years probation and fined 100 hs 100,000 for sharing classified material with his onetime mistress. He gave a statemt to apologizing for his actions. Turning to the race for 2016 Hillary Clinton under fire tonit as she carries on her Campaign Amid a slew of negative headlines that raise questions about the dealings of her familys foundation goin back to her time as secretary of state. Nbcs Andrea Mitchell takes a closer look. Reporter Hillary Clinton, the biggest celebrity at a starstudded womens conference in new york tonight. Hasnt this been repor cheering stop clinton is trailed by a cascade of stories about whether she did favo as secretary of e for donors to her family charities. Chelsea clinton, now the foundations vice chair, defended their work today. What the Clinton Foundation has said that that well be even more transparent. Reporter when she took office Hillary Clinton, pressed by the white house, to a memo voluntarily disclosing foreign contributions. But the upcoming book clinton cash obtained by nbc news claims she did not live up to that promise. While she was trying to reset relations with russia the book describes how russias Nuclear Agency rosatom gained control of a u. S. Uranium company. The author Peter Schweizer writes shortly after the deal was announced bill clinton was in moscow for a particularly well compensated speech. He was paid 500,000 from another russian entity. And the book claims, however hawkish hillary might have been on other deals, this one sailed through. The russian purchase uranium one was approved. The author asks why the apparent reversal . Could it be because shareholders involved in the transactions had transferred approximately 145 million to the Clinton Foundation or its initiatives . S a pouncing. Look shes going to have to be held accountable like all of us. Reporter but the Clinton Campaign strongly challenged book today writing Hillary Clinton was involved in the state departments review of the sale to the russians and that nine agencies were involved. A government ethics expert agrees. Theres no smoking gun. Theres no evidence that she changed a policy based on the donations to the foundation. But he and other experts say that the book does establish the clintons did not live up to their promise to disclose all foreign donations. On another front today the House Benghazi Committee said theyll have her testify in public the week of may 18th about her emails and return in june to testify about the benghazi attacks. Lester . An degree wa mitchell in our washington newsroom thank you. That scare in the r we told you about forced a sky west plane to make an Emergency Landing in buffalo was apparently more serious than we were originally told. It turns out not one but three passengers passed out and more than a dozen fell ill. That forced the pilot to make a steep but harrowing descent. Reporter we now know as many as 14 people on board that United Airlines sky west flight from chicago to hartford became ill yesterday. It started with er nurse Mary Cunningham helping a sick passenger hood passed out. Shes responding her color was awful. She didnt look good. We got her some oxygen. She was much more alert. R soon anot p fainted, then a Flight Attendant and mary herself became ill. I had to sit down. I was short of breath lightheaded, didnt feel great. Reporte before thr passengers had passed out all seated in the middle of the plane. Many more reported being sick. I had a headache. I felt a little dizzy, a little tightness in my chest. Repor fearing the worst, a cabin pressure problem, the captain descended rapidly from 37,000 feet down to 10,000 and averted to buffalo. S scary. There was a lot of people with their heads down praying. Reporter once on the ground everyone 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 leak or pressurization problem. Sickened 14 people and caused 3 to pass out remains a mystery. Tonight sky west says that plane is returning to service. Tom costello nbc news, washington. Of delays the senate voted to confirm Loretta Lynch as attogeneral. The vote was 5643 with 10 republicans joining all Senate Democrats in voting yes. Lynch will replace eric holder and become the first africanamerican woman to serve as attorney general. For three days a jury has lived the horror of the Boston Marathon bombing through the words and 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 knew he was targeting children with his attack. Pete williams was back in court. Reporter its one of the searing images from boston a Police Officer rushing a wounded boy from the danger. Just moments before 3yearold Leo Woolfenden was in this stroller. Thats his father steven at the top of the screen unaware that hes heading toward a bomb. People around him wince as the first bomb goes off a block away. Just three seconds left Dzhokhar Tsarnaev passes right by steven and his son in a stroller. Further proof that tsarnaev knew children would be among the victims. In court today woolfenden said as he lay on the street his left leg blown off, he noticed hiss d because i know if i would ever see my son again. He turned and saw 8yearold Martin Richard next to him clearly near death. His mother repeating, please martin. Marc fucarile who lost one leg says doctors are working to save another. Three dozen bbs are embedded in his body. As for leo, he suffered a fractured skull and perforated eardrum. Defense lawyers begin presenting their witnesses on monday includg some of his relatives, hoping to spare him the death penalty. Lester . Pete thank you. In oklahoma new revelations tonight ab the training of reserve deputy received before he says he mistakenly shot and killed a man. An internal review found kirnconcerns about robert bates going back several year. Gabe gutierrez has the details. In 2009 the Tulsa County Sheriffs Office launched an internal review into the offices treatment of reserve Deputy Robert bates finding incomplete field training. Colleagues reported when confronted bates, a political 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. Im sorry. Repor the lawy for eric Harris Family are now calling on the sheriff to resign. The publics entitled to know the truth. The Harris Family is entitled to know the truth and they need to be transparent. Reporter bates Attorney Says he has not seen the report but in a written statement said since 2009 mr. Bates has received hundreds of hour hs of training and experience in the field. The Sheriffs Office acknowledges there was a 2009 internal review but a Spokesman Says no acti was ever taken. Earlier this week sheriff glanz acknowledge that he and bates have been Close Friends for years but insists that bates was properly trained. Given what you know now, should mr. Bates have been out there that day . Yes, he should have been. Pleaded not guilty to Second Degree man slaughter and the ju allowed him to travel to a preplanned vacation in the bahamas. His set for july. Gabe gutierrez, nbc news tulsa, oklahoma. Still ahead here tonight our nbc news exclusive, dr. Oz under fire now firing back at his critics who says he pushes socalled quack treatments on his show. 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Science suggests when you have insomnia, the neurotransmitters in your wake system may be too strong, which may be preventing you from getting the sleep you need. Talk to your doctor about ways to manage your insomnia. Who. Is this . hi, i am heinz new mustard. Hi na na na na shes just jealous because you have better taste. Whatever. Hey. Keep your chin up. For years, heinz ketchup has been with the wrong mustard. Well, not anymore. Introducing heinz new better tasting yellow mustard. Mmm tonight dr. Oz is facing new heat as more doctors come out against him, and now its doctors from within his own hospital raising questions about some of the Health Advice he dispenses on his show. Tonight, in an exclusive interview, he opens up to nbcs Stephanie Gosk coming out swinging against his critics. You may have seen the headlines reporter today on his show dr. Oz turned the tables attacking a group of doctors from around the country who last week wrote a letter insisting he be fired from Columbia University. Some of them have their own conflict of interest issues. Reporter but now more criticism. In a usa to 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 sully the reputation of Columbia University. Before the editorial was published dr. Oz defended the content of his show in an exclusive interview with nbc news. The shows purpose is not to talk about medicine. The shows 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 dont people that watch your show expect that kind of advice medical advice . Its called the dr. Oz show. We very purposefully in the logo have oz in the middle and doctor up in the upper bar for a reason. I want folks to realize im a doctor and im coming into their lives to be supportive of them but its not a medical show. Rep the argu among your critic is as a doctor you should be promoting things youd promote in your exam room not your living room . Im very respectful of my critics and i understand why youd be much more comfortable if everything i said on is everything that a doctor would say in his office but thats not what the shows about. R it does not call for ozs resignation, but the authors want a disclaimer on his show stating that the opinions expressed may not be based on evidence and arent endorsed by Columbia University. Stephanie gosk nbc news new york. We want you to know that dr. Oz will appear live tomorrow morning on today. Were back in a moment with a state of emergency as a Sleeping Giant. Congratulations. Youre down with crestor. 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