From nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. Today donald trump publicly acknowledged what most americans have accepted at the truth for years. That president barack obama was born in the united states. Trump was an outspoken voice of the Birther Movement which challenged obamas legitimacy as president. Today without apology trump admitted the president i natural born american, and in the same breath, managed to wrongly accuse Hillary Clinton of first launching the discredited movement. Tonight clinton is leading the growing outrage among democrats. We have two reports tonight, lets start with nbcs hallie jackson. Hallie, good evening. Reporter good evening, lester. Among the many conspiracy theories donald trump has talked about, few topics as central to his early political identity. Even after his campaign tried to weeks, we heard nothing definitive from the candidate himself behind me, on the campaign trail in miami, until today. Donald trump today finally submitting to the truth. President barack obama was born in the united states, period. Reporter a sevensecond statement after 28 minutes of buildup, trying to reverse a position trumps held for five years, championing a Conspiracy Theory. Certificate . Im starting to wonder myself whether he was born in this country. I have people who have been studying it and cannot believe what theyre finding. He gave a birth certificate, whether or not that was a real certificate, because a lot of people question it. I certainly question it. Reporter today in his reversal, he didnt admit he was wrong, didnt say he was sorry, and didnt tell the truth when he said this. Hillary clinton and her i finished it. Reporter neither clinton nor her campaign made Barack Obamas citizenship an issue. And as he sarcastically said in the oval office today, neither did the president himself. I was pretty confident about where i was born. I think most people were as well. Reporter the president brushing off trump like he did after releasing his longform birth certificate in 2011. We can finally get back to like, did we fake the moon landing . [ laughter ] reporter its not just what the gop nominee said today, but how and where he said it. The opening of his new d. C. Hotel, a photo op with cameras allowed, but not questions from journalists. Who watched the stage collapse after trump walked off. Finally agreeing to admit that president obama was born in the united states, thats meant to gain him support with White Reporter trump trying to undo years of perpetuating a lie with a single sentence, a single question remaining. Will it work . Hallie jackson, nbc news, miami. Reporter im Kristen Welker in washington where tonight democrats are attacking donald trump from all sides. Donald trump is a disgusting fraud. Reporter charging trump cant distance himself from the birther Conspiracy Theory which he helped lead. Hes not qualified to be mm hes a hater in chief. Reporter the outrage palpable in washington, where members of the Congressional Black Caucus unleashed unbridled anger. We will not be treated as secondclass citizens. We will not elect a cheap bigot. Reporter its a fight the Clinton Campaign welcomes, as Hillary Clinton tries to rebound from her rockiest stretch yet, a chance to fire up the base. A recent nbc survey Monkey Online Poll showing more than 8 clinton even speaking out before trumps announcement at an event for African American women. Barack obama was born in america, plain and simple, and donald trump owes him and the American People an apology. Reporter later her Campaign Calling trumps statement a disgrace. His campaign was founded on this outrageous lie. There is no erasing it in history. Reporter all of it happening on a day when Michelle Obama was out for the first time the first lady getting personal. There were those who questioned and continue to question for the past eight years, up to this very day, whether my husband was even born in this country. Barack has answered those questions with the example he set by going high when they go low. Reporter tonight yet another poll showing the race between just ten days away. The return of the birther issue shows a challenge for Hillary Clinton. She needs to highlight aspects of Donald Trumps background that inspire democrats to turn out to vote. But she also needs to continue to sell herself. And tonight clinton aides tell nbc news there are few issues that rally their core supporters like the birther controversy. A possible topic when the president and clinton speak tomorrow night at the Congressional Black Caucus dinner. Lester . Kristen welker, thank you. Turning now to t moderator of meet the press. Chuck, i need you to help us understand whats happening here. This is the same week in which trump releases the results of a medical exam on dr. Oz. Today he comes on stage, drops this, and walks off. Whats happening . I think whats happening, in the race itself, this is the first week where ive truly stared at this race and realized, i dont know whos going to win. It felt before it was in Hillary Clintons favor. Thats gone. Is suddenly feeling his oats a little bit. The question will be, how does he handle this moment where for the first time people are going to judge him more as a potential president. I think for the last few months, perhaps for the last year, no ones believed he could get as close as hes gotten. Now that hes here, the conversation could change among a lot of people in front of their kitchen tables and things like that. All it does, it raises the stakes for the first debate even more. Us campaign who so desperately cant wait for that debate. They need desperately to reset this race. As its going right now, its not going well for her. Chuck todd, thank you. Much more on the race for president this sunday on meet the press. Among chucks guests, democratic Vice President ial candidate tim kaine. The stage is now set for the first president ial debate and only donald trump and Hillary Clinton will be on it. The commission on president ial have enough support in the polls to be included at the first debate which will be held on september 26th. Turning now to a developing story, the governors of five Southern States have declared states of emergency this evening. Out of an abundance of caution following a massive fuel spill. It has forced a shutdown of a crucial gasoline pipeline and is not only driving up prices at the pump for millions of americans, its sparking fears of fuel shortages. Nbcs ann thompson now with the latest. Effect. A knoxville, tennessee, gas station on empty. Because of a Pipeline Leak in shelby county, alabama. The colonial pipelines line one stretches from houston to new york harbor. Servicing 13 states, delivering 40 of the gasoline used on the east coast. But six Southern States could be hard hit by shortages and most certainly price spikes. Youll feel it in your wallet quickly. Reporter says gas buddy. Com across the six states, an average of 5 to 20 cents a gallon, and it could be even worse. Reporter overnight, he says, atlantas price jumped seven cents a gallon. Im going to fill up and try to conserve, most definitely. Reporter the epa says the spill is contained to a retention pond and its doing everything to keep the gas out of a nearby river. I hope it doesnt get any worse. Like, especially leaking into reporter the government says the spill poses no danger to people in this rural area, but for those depending on the pipelines fuel, colonial says it will be next week before repairs are finished and gasoline is flowing freely again. Until then, consumers are bracing for impact at the pump. Ann thompson, nbc news, chicago. Turning now to the gripping images of First Responders in action that are taking us into the dark trenches of a deadly and growing epidemic in this government is launching a new initiative to curve the Opioid Crisis that claims tens of thousands of american lives every year. We get more from nbcs pete williams. Reporter when a cleveland, ohio, woman saw this man slumped behind the wheel of a parked car, she feared the worst. I thought i was staring in the face of death. It was scary. I was just thinking, like, what can i do . Reporter she posted these pictures after police responded, suspectero gave lifesaving medication. A scene disturbingly similar to what ohio police recently posted. A couple passed out in a car from a suspected overdose with a 4yearold in the back seat. The Drug Enforcement administration estimates 28,000 people die each year from heroin overdoses. Heroin Overdose Deaths are now three times what they were in 2010. One reason, street suppliers are mixing in the drug fentanyl but its 50 times stronger, making it even more dangerous. And the dea is cracking down. Now the Justice Department is launching a new push against doctors who overprescribe painkillers. If you get addicted to a prescription pill, it gets real expensive to replace that on the street. Heroin is a plentiful and cheap and deadly substitute. Reporter the Nations Police feel overwhelmed. In janesville, wisconsin, officer chad woodman tells addicts, reform or face prison or death. Getting people off the street and out of their environment and placed into a safe environment is rare. Its incredibly difficult. Reporter 34 states now have laws giving legal immunity to people who call 911 to report overdoses and to the victims themselves, hoping to save more lives like this one on a cleveland street. Pete williams, nbc news, washington. A suspected serial killer in ohio is being held this evening on a Million Dollars bond. Hes facing two murder charges and one count of kidnapping. As we reported last night, grate was arrested after a woman he allegedly abducted called 911, leading police to rescue her at an abandoned home. They discovered two bodies at that scene and a third elsewhere. After surviving a vicious attack here in new york, a brave Police Detective is now out of the hospital. Detective Brian Odonnell emerged toer police, who say that they caught him trying to remove a boot from his car. He was left with a gash from his temple to his jaw. Turning overseas where the pentagon says an air strike earlier this month near raqqah killed the isis information minister. The man behind the groups often gruesome propaganda videos. A fragile ceasefire remains in effect in syria between rebels and regime forces, but as our reaching desperate civilians. Reporter rare moments of joy for children under siege. Free to play. In rebelheld eastern aleppo, they celebrate while they can. They were afraid of air strikes, he says. Now they can relax a little. But theyre still waiting for the food the ceasefire deal promised. Its stuck on 40 trucks. The u. N. Blaming syrias government. Forces to let the food through, but the rebels didnt. Its a blame game. The u. S. And russia joining in. Their ceasefire deal is shredding. There was fighting today beyond aleppo. And theres no ceasefire here in damascus. Just behind me, theres been heavy shelling today. The syrian army firing repeatedly after they say they were attacked by rebels. In aleppo, rescuers, the white the Nobel Peace Prize, wait anxiously tonight. We need everything, we need bread, we need rice, we need fuel, we need medicine. Reporter it is still dangerous here. Even u. S. Special forces came under fire today, apparently friendly fire, say defense officials. The troops coming to raise their American Flag to identify themselves. Nobody was injured. Lester . Bill neely, thank you. Still ahead this evening, think twice before selling o why they can be a gold mine for thieves looking to rip you off, even after youve erased your personal data. Also, thats not a crater on the moon, its a phenomenon here on earth and its sparking were back now with a warning thats especially timely after recent hacks of high profile americans like colin powell. Its about selling or recycling your old cell phones and computers. Ma your personal data from them, but as tom costello explains, its very easy for the next owner to recover it all. Reporter the last time you upgraded to a new computer, did you first take a drill to the Old Computers memory . Because if you thought just deleting all those bank and tax forms, credit cards, passwords, photos and emails was enough, think again. Delete doesnt mean gone. So if you just delete files from your device, put it into the its still there. Reporter to prove it, the recovery experts at Kroll Ontrack had me delete from my Computers Personal photos, mock Financial Information and passwords. Then send a computer and hard drive off to their lab in minneapolis. But recovering all that data was as easy as downloading Free Software from the internet. In all honesty, it was really easy. Yep, didnt take very long at all. It was a matter of hours and we had access to all your data. We created this bank statement. Its not real. But the point is, i thought i deleted it. And it was there for the taking. We have your bank statement, your bank account numbers, how much money you have. Reporter its a big problem. Kroll ontrack recently bought a hundred phones and pcs online. Nearly half still contained personal information. If the person who buys or inherits your used computer or phone has basic Free Software, your data becomes his. The advice, buy a program that truly deletes all your data and taking a hammer or drill to the platters and memory chips inside your computer. Theres data stored on both sides of the platters. The whole thing must be destroyed . Yes. Reporter a little destruction can bring peace of mind. Tom costello, nbc news, minneapolis. Were back in a moment with why some lining up for the new iphone 7 might be awfully a massive sinkhole discovered in florida is raising serious safety concerns. Its about 45 feet across with depths unknown. Officials say it allowed over 200 million gallons of radioactive water from a fertilizer plant to aquaphor. The Company Maintains surrounding areas are not at risk. The wait is over for apple customers. Today with the traditional lines wrapping around the block. But if you didnt preorder, you may be out of luck. The company says the jet black model of the iphone 7 plus sold out. The new version has controversial changes including getting rid of the controversial headphone jack. The u. N. Got star power today from world renowned human rights attorney amal clooney. She was on hand to support one of her clients, nadia murad, who survived isis captivity. She was named a goodwill ambassador for the u. N. Today and also nominated for the Nobel Peace Prize today. Amal sits down with her and clooney, as she opens up about her biggest case ever taking isis to court. Thats monday on nightly news. When we come back, a real, live super hero on a quest to bring smiles to childrens. The brother debate taking center stage on the campaign trail. The key role arizona has played in all of it. Owsy claritin. Join claritin Blue Sky Living today. Finally tonight, being a super hero doesnt always mean leaping Tall Buildings in a single bound. There are plenty of real life super heroes around us every tonight Kevin Tibbles introduces us to one who is making a difference for some very brave kids. Im batman. Reporter battling the evil forces of illness. Whats he wearing today . Batman . Reporter is the super hero nurse at chicagos childrens hospital. Wheres the phone booth that you get changed in . Ask superman. Reporter for 12 years Tobin Matthew has swooped down with one purpose to fight the fear. That no matter what theyre to go through this together and i will do my best. I will try. Reporter this super nurse has played all sorts of good guys over the years. Spiderman is around the corner. Reporter even hanging upside down as spiderman. Anything to put a smile on a sick kids face. They feel hes there to help them, that hes there to make things not so scary. And he is . And he definitely does. Reporter on his rounds, positivity helps you for sure get healthier, helps you want to do things, getting out of bed. Reporter positive persuasion, more powerful than a locomotive. We need nurses who are definitely focused on the whole patient, not just the ailment. Tobin is definitely focused on the whole kid. Reporter for 11yearold cancer patient shane callahan, anyone with a stethoscope is a. Right now in avondale mother convicted in a horrific case of child abuse has just been released of prison. Originally sentenced to almost 200 years behind bars for injuring her quadruplets back in 1999, she has been released after to 17 years. Dee dee gatton talked children about their relate her release and the impact it has had on their lives. Two of the boys be first learned about through headlines grew up right here on this farm describing their childhood as happy, normal. A stark contrast from when they started their lives at the hands of their very own mother as news of her release reemerges this week. As you can imagine it has been like a kids paradise, really fun. Reporter growing up on a farm for matthew read misses home. A 16 yearold arab, he is