Officer to face such a charge. And a report from rio where its already game on. Nightly news begins right now. Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. Im Savannah Guthrie in for lester tonight. In a sense there are two dateline campaigns tonight. The one that publicly Officials Say is right on track with rumors of internal infighting and panic vastly overblown. And then theres the one openly breaking with Top Republican leaders fending off controversy after controversy to the point some worried dateline allies are reportedly thinking of confronting the candidate. Add to that new concerns over what would happen if a president dateline had access to this countrys nuclear codes. Lets get to Hallie Jackson on the campaign trail from jacksonville tonight. Deadly intent has never had a twoday period like this. How he acts at rallies like this one will determine whether his campaign recovers or whether some republicans say goodbye for good. Publicly everythings fine. The campaign is doing really well. Its never been so well united. Reporter privately, anything but. Multiple high level gop sources telling nbc news of a possible inteti Trump Supporters rudy giuliani. As they try to get the trump train back on track. Currently in, quote, crazytown. Even ally Newt Gingrich calling his candidate unacceptable right now. President george w. Bush taking aim at his isolationism. Trump trumps team assists there is no intervention. The clinton may ma sheen may not like it, but were prepared for party. After trumps refusal to endorse paul ryan. I strongly endorse ryan. Hes a longtime friend. Reporter partly fueled by this question. Could you trust trump with the Nations Nuclear codes . One Top Republican National Security adviser writing, imagine having to turn launch keys not knowing if under attack or if it was because a foreign leader said a mean thing on twitter. But even after a list of controversies in just the last 24 hours, trumps still within striking distance of Hillary Clinton. Those are the elite Republican Party hes in trouble with. Not the regular Republican Party like me. Reporter some supporters hoping in the gop civil war, its trump who will prevail. Hallie jackson, jacksonville. Reporter im Hillary Clinton looking to capitalize on Donald Trumps missteps in colorado. If he wants to make America Great again, he should start by making things in america. Reporter clinton looking to pick off from working class voters today at a tie company accusing trump of outsourcing. I really would like him to explain why he paid Chinese Workers to make trump ties. Reporter and shes picking up an endorsement from gubernatorial cande hewlettpackard ceo meg whitman. Whitman writing in a statement, trumps unsteady hand would endanger our prosperity and National Security. I have decided to support Hillary Rodham clinton. This following scathing remarks from whitman made in march. Campaign sources tell nbc news theyre courting the independents and republicans. Already winning over the first to pledge his support for clinton. But trump is still competitive announcing an 80 Million Fund Raising event. Catching up to clinton who netted 90 million last month. Still with voters struggling to trust her, clinton also has vulnerabilities heading into the fall. We are almost 98 days away from this thing. This is not the time for a victory lap. This is the time, again, to hunker down, to continue to sharpen the message did yesterday. Reporter hoping that work can turn the Never Trump Movement into the im with her campaign. Kristen welker, nbc news, washington. For more on all of this, lets go to our political director moderator of meet the press, chuck todd. Is there really an intervention in the works . Would donald trump even accept such a meeting . There is a ton of concern with a lot of Republican Leaders mostly in washington. It has to do, of course, with the treatment of paul ryan in particular. The fact that he has just had the six worst days of the general election and they dont want it to get worse. Whether you call it an intervention, its sort of the same thing that got them to get manafort as campaign manager. That got trump to go with mike pence rather than Newt Gingrich. Plea with the kids. That has been the key to getting trump to comport with party wishes before. So ultimately thats what its about. Will the kids be the ones to intervene . Chuck todd in washington, thank you we turn now to new images showing the terror inside a passenger plane moments after it crash landed. Hundreds scrambling to escape the emirates jet after it exploded at the dubai airport. We get more now from nbcs kelly cobiella. Reporter a boeing 777 on fire. Smoke billowing from the fuselage. This new video purports to show the panic inside. Passengers trying to jump jump jump leave your bags behind reporter the crew trying to evacuate before this. Right after we got out, the plane blew up. Reporter Jarrett George was on board and said there was no warning of an emergency landing. After the plane stopped, then the smoke started coming inside. And they were saying just jump, just jump. Reporter remarkably all 300 passengers and crew t there was one fatality. A firefighter battling the flames. The fire gutted the plane from cockpit to tail. Tonight an Aviation Industry source told nbc news one possible explanation. An aborted landing because of powerful gusts. Or wind sheer. That would have been quite often beyond the control of the pilots to avoid contacting the ground. Reporter investigators now look to the pilots and the answers. Kelly cobiella, nbc news, london. A troubling first to tell you about tonight. A washington, d. C. , transit officer accused of trying to help isis by coming to the aid of a man he thought was traveling overseas to join that terror group. This is the first u. S. Law enforcement officer to face such a charge. Nbcs Pete Williams now with the story. Reporter police and federal agents today searches the suburban Washington Home of nicholas young, a the d. C. Transit police accused of helping a man he thought was going overseas to join isis but who was working undercover for the fbi. The fbis been watching young and his house for nearly six years. Ever since a friend was arrested for trying to join a terror group in somalia and another friend was arrested for plotting to set off a bomb at the u. S. Capitol. Neighbors say they kept their distance. We knew something was weird about him, we just never expected it to be, you know, Something Like this. Fbi five times over the years telling them he collected nazi memorabilia and twice went to libya to join rebels fighting the gadhafi regime. He met with operative 20 times and bought 240 of gift cards for apps scrambling Text Messages making them impossible to intercept. You have to look at all potential threats seriously. And you have to try to appear to be developing in dangerous ways. Reporter no comment from young who appeared briefly today in court or his lawyer. The fbi says he told friends he was constantly on guard fearing he was under surveillance apparently unaware that he really was. Pete williams, nbc news, alexandria, virginia. And now to the fire storm facing the president tonight. Did the u. S. In effect pay ransom to iran to free american prisoners at the very moment the obama heralded Iranian Nuclear deal . The white house says no. But critics are saying the timing is deeply troubling. Heres nbcs chief Foreign Affairs correspondent andrea mitchell. Reporter it is a tale of two exchanges. Four american prisoners finally released from iran last january. At midnight an unmarked cargo plane loaded with cash from the netherlands and switzerland takes off for tehran. 400 million of irans money frozen by the crisis in 1981. Is the payment coincidence or ransom . Violating a long standing u. S. Policy not to pay to free captive americans. The president the next day claiming no connection. With the nuclear deal done, prisoners released, the time was right to resolve this dispute as well. Reporter firing up critics today, donald trump pouncing. This was started by crooked Hillary Clinton. Reporter although it took place four office. We basically paid ransom to the iranian regime. Reporter the administration aggressively defending the deal. We do not pay ransom. Period. This was not ransom. Period. Reporter former prisoner Jason Rezaians brother. Im thankful the administration did everything they could to bring him home and others as well. Reporter but does it damage u. S. Credibility as it did a no house sticks to when refusing to bargain with isis. You should never pay ransom for hostages. Im concerned the iranians might think thats the deal they got. Reporter the white house says this deal actually saved the taxpayers billions in interest and penalty. Because an International Court was about to impose that on the u. S. For dragging its heels. Still it is a toxic issue to erupt for a former secretary of state this close to the election. Savannah . All right, andrea. Thank you. Now to rio where the olympic torch has away now from the Opening Ceremony. Today we learned michael phelps, the most decorated olympian in history will be the flag bearer for the united states. This as competition got under way tonight. And some of the u. S. Athletes took the field. Miguel almaguer. Reporter the olympic torch now in the city of samba. There was as much celebration as cu some trying to extinguish the torch calling these the games of inequality. But today the games go on. The u. S. Womens soccer team on the field. And here comes phelps to the wall reporter while another favorite to strike gold, michael phelps, learned he will be team usas flag bearer. What does that mean to you . To even be nominated to carry the flag is an honor to me. Then to have my carry the flag into opening ceremoniceremonies, its an honor. Reporter phelps has never walked an Opening Ceremony choosing instead to rest up instead. In every other olympics i felt laser focused on every little thing that i didnt get to enjoy every small thing. Im enjoying this process a lot more. Reporter phelps and american swimmers could compete against the russians. With much of the russian delegation barred from competition for doping, some of their athletes are still appealing that stage is set. Opening ceremony is in two days. Miguel almaguer, nbc news, rio. And a program note, lester holt begins anchoring our live nightly News Coverage from rio tomorrow night. Still ahead from here tonight, living in fear of zika virus in the u. S. The extreme measures pregnant women are taking to keep their babies safe. Also monsoon flash floods overwhelming the chances of i take prilosec otc each morning for my frequent heartburn because you cant beat zero heartburn ahhh the sweet taste of victory prilosec otc. One pill each morning. Were back now with the battle to stop the spread of zika in the u. S. Late today floridas governor announced that free testing will be offered to all pregnant women in the state. And while no new home grown cases were reported today, concerns remain high as nbcs Kerry Sanders explains now, many reporter 91 degrees outside in miami, but amanda romero, 37 weeks pregnant, is doing everything she can to avoid contact with mosquitoes like wearing long sleeves today and moving quickly from the house into the car. I have a lot of friends that are pregnant right now and all of us are kind of scared saying bug spray is our new perfume. Reporter at body belly baby today, some pregnant moms might leave town. I actually killed a mosquito inside our house last night. And my husband said maybe its california. My sister lives there. Reporter obgyns like Rebecca Martinez telling mothers to be their anxieties are justified. Weve never faced a situation like this. In the 30 years that ive been practicing. Im scared for my patients because the recommendations change daily and i know how scared they are. Reporter last nights heavy rains left perfect mosquito breeding grounds. In a first, the city vacuumed those puddles. Delayed this Mosquito Control plane from taking off. In addition to the already intense efforts on the ground, the battle plan . Spray a ten mile area around the zika zone with an insecond side kaled naled. Its been used for 50 years. Would i stand outside while the planes are going over . I wouldnt. But i also know im not going to absorb a toxic amount of pesticide. Reporter experts say folks who live in this target zone and hear the plane should not only get indoors but wait about two hours before coming back out. News, miami. And were back in a moment with a big honor for a little boy wh when it comes to healthcare, seconds can mean the difference between life and death. For partners in health, time is life. We have 18,000 people around the world. The microsoft cloud helps our entire staff stay connected and Work Together in real time to help those that need it. Changes how we live. Tired of redosing antacids . Try duo fusion new, two in one heartburn relief. The antacid goes to work in seconds. And the acid reducer lasts up to 12 hours try new duo fusion. From the makers of zantac. . Im going to make this as simple as possible for you. You can go ahead and stick with that complicated credit card that limits where you earn bonus cash back. Or. You can get the quicksilver card from capital one. Quicksilver earns you unlimited 1. 5 cash back whats in your wallet . . If you have moderate to severe plaque psoriasis, isnt it time to let the real you shine through . Introducing Otezla Apremilast . Otezla is not an injection or a cream. Its a pill that treats plaque psoriasis differently. With otezla, 75 clearer skin is achievable after just 4 months, with reduced redness, thickness, and scaliness of plaques. Has no requirement for routine lab monitoring. Dont take otezla if you are allergic to any of its ingredients. Otezla may increase the risk of depression. Tell your doctor if you have a history of depression or suicidal thoughts, or if these feelings develop. Some people taking otezla reported weight loss. Your doctor should monitor your weight and may stop treatment. Side effects may include diarrhea, nausea, upper respiratory tract infection, and headache. Tell your doctor about all the medicines you take, rmatologist about otezla today. Otezla. Show more of you. Were back now with torrential flooding from a historic rainstorm slamming phoenix, arizona, swamping parts of the city. Just incredible scenes there. And the threat isnt over this evening. Lets get the very latest from nbcs joe fryer. Reporter in and they kept coming. The National Weather Service Called it a 100year event. Desert cities pelted with two inches of rain in just an hour. Submerging streets, overwhelming entire neighborhoods, trapping motorists on the i17. The citys water pumps were no match for the flash floods. Commuters traded time for safety. I watched it rain for about an hour, it seemed like. It rained really hard. Hardest i million americans across the southwest are living under a Flash Flood Watch in what has already been a deadly week. Theres people in the water reporter in maryland, newly released 911 call from the deluge that killed two provide realtime reaction to the devastation. Whats happening, maam . The water has broken through the floor. Reporter six inches of rain creating a torrent stronger than cars. We cant go outside. I tried ied to walk in temperatures giving way to rising waters with catastrophic results. Joe fryer, nbc news. We have an update now on a brave little boy who many of our viewers will definitely recognize. 9yearold zion harvey got a big honor at last nights Baltimore Orioles game. He threw out the first pitch. We profiled zion a little over a year ago. He became the first chiel ever to receive a double hand transplant then. Zion lost his hands and feet to a life re when we come back, a teenager going for gold. Were with the riley hey guys whats up . jessica so the new recipe of beneful is really excellent. The first ingredient is chicken. Would try to put his face in it all day. Yeah you love it, dont you . You love it so much i feel like when he eats beneful, he kind turns into a puppy again. Its protein. Its vegetables. Its grains. I mean, like that sounds like a dinner id make for myself, right . riley hey its a big bag. Just have some of mine. vo try new beneful healthy weight with chicken. Now with real chicken as the number one ingredient, healthful. Flavorful. Beneful. Put some distance between you and temptation with. Clinically proven to help reduce hunger between meals. New, fwhen people askthe 1 doctme what its likeand. To win an olympic medal, i tell them, you already know. The medals youve earned are all around you. Your bronze. Your silver. Your gold. And Liberty Mutual insures them all. Liberty mutual is proud to insure n life. Liberty stands with you. Liberty mutual insurance. Tonight, ever since table tennis became an olympic sport at the seoul games in 1988, the u. S. Has never brought home a medal for it. But that could all change in rio thanks to a teenager whos already got a major claim to fame on team usa. Jolene kent with the story. Reporter at just 16, kanak jha is the youngest american athlete to qualify for the rio olympics. To rio. I dont think it matters how old a person is because in the end you just want to win. Reporter hes the son of immigrants and like so many tales in silicon valley, kanak got started in his familys garage. At just 5 years old. Playing with his mother karuna jane. I started playing because nobody wanted to play with him. Reporter his older sister humored him and eventually kanak started to win. I had it. I was going to hit it for a long time. We wanted to beat each other. Reporter soon the kid wonder was filling drawers and shelves with trophies and medals. In some ways kanak is a typical american teenager who likes playing video games in his spare time. But he doesnt have much of it. Kanak takes his High School Courses online. So he can practice up to six hours a day. Working on his explosive footwork and best here . Coach massimo says kanak has everything. He has the skills and hands and great determination. So you put everything together and it comes a big talent. Reporter his childhood idol tim wang has taken notice and now theyre olympic teammates. Hes like a dog that bites onto your leg and wont let go no mr reporter for kanak success means physical strength and staying cool under pressure. Anything you do right before you go out for a match . I wouldnt say im superstitious, but i do say some stuff to myself just to calm me down and its like a mantra, kind of. Reporter want to share it with us . No. Sorry. Reporter its a secret. Yeah. Reporter a secret he hopes will take him straight to the top. Thats going to do it for us on a wednesday night. Im Savannah Guthrie. See you tomorrow Morning Bright and early on today. From all of us at nbc news, thanks for watching and good anchor now at 7 a developing story. Conduct concerns at boston latin. An investigation reveals more than a hundred allegations of racism over the last 4 years. Reporter mostly clear skies tonight. Back into the sunshine tomorrow. Anchor a reported shark sighting on the vineyard be on that bike. Anchor a teen hit and killed riding his dirt bike in the street. Reporter a big bust after a bank robbery in lam ham. This is is no stranger to police. Anchor a new mission to raise awareness. Anchor its a bucket of beans for a great cause. 7 news at 7 starts now. Anchor first at 7 we are following a developing story. A new report uncovering more