Adds another gold to his record tally. Number 19. And team usa dominating on the bars and the beam. The best ive seen her do it. Now simone biles leading the charge for dmror ray. Hi, im simone biles, good morning, america. Can she become the first woman ever to win five gold medals at a single olympics . Were live in rio for all the action. And good morning, america. Hope hyou had a good weekend. What a start for the americans. Team usa taking home two gold medals. Amy with the latest from the olympics including the moment everybody is talking about, this swimmer making quite a statement about the russian doping scandal. Yeah, a lot to get into. But first that breaking news, delta flights grounded worldwide overnight. Some frustrated travelers sharing these photos of some long lines right now and delta due to a global computer outage. Abcs david kerley is at Reagan National airport with the latest. Good morning, david. Reporter the latest and the long line, george. Tens of thousands of passengers are being affected. Heres just one line national airport, Reagan National airport. The line here, no delta jets are taking off. This computer outage started overnight. It is continuing at this hour. If a delta jet is in the air it will continue and land but nothing is taking off from the gr there was a passenger in sacramento who sent us an audio file of the pilot explaining what happened overnight. Back in our Operations Control Center in atlanta, a huge room, the center of the whole operation, their computers are down and if youve been trying to call and get rebooked or call the diamond desk or anything, it looks like everybody is in the same boat. Reporter delta says in a statement a computer outage has impacted flights and is advising the issue is being addressed. But there is no solution so far. Delta now joins the other major carriers that have been hit by computer shutdowns. A year ago united had nearly 5,000 flights affected. Just last month southwest canceled 2300 flights. This looks like it could be a lot worse, george. It is morning, it is rush, it is monday and no delta jets are taking off around the globe. Yeah, and, david, i think most of us assume theres some kind of failsafe mechanism in plac b every flight all over the world. How could that be . Reporter yeah, delta is not being specific exactly what happened with their Computer System but all this information is critical to pilots. They need to know weather data, how many people theyre carrying, dispatchers have to know weights. All these things are reliant on computers. A system goes down, youre not flying. Ripple effects everywhere. David kerley, thanks very much. We turn to that tragic accident at a popular water park. A 10yearold boy killed in tallest water slide in the world. The park closed this morning as investigators try to determine what went wrong. Abcs alex perez is in kansas city with the latest. Good morning, to you, alex. Reporter good morning, lara. It was a Beautiful Day here at the park. Packed with families when something went terribly wrong. This morning, authorities investigating what went tragically wrong at this popular kansas city water park. The mother was screaming, hes not moving. Thats my boy. The 10yearold son of kansas state representative scott schwab died while riding whats known as the tallest water slide in the world here at the schlitterbahn water park. Schwab telling abc news overnight since the day caleb was born he brought abundant joy to our family. We are comforted knowing he believed in our savior jesus and they are forever together now. We will see him another day. It still brought tears to my eyes that someone else lost their job thats my childs age safe. Reporter this morning while the city grieves investigators are remaining tightlipped not releasing any details of what happened sunday at the kansas park. Our thoughts and prayers are with the family during this difficult time. Reporter this is what the ride called verruckt german for insane looks like from the top standing at 168 feet high its taller than the statue of liberty and plummets its thrill seekers a jawdropping 17 stories in just seconds. Tubers 70 miles per hour. Commercials for the ride even asking the question are you insane . Reporter the slide requires a minimum inches of 53 inches and two to three riders have to be in a raft with a total weight of at least 400 pounds. Sliders had to be at least 14 when the ride opened. That has since changed but before it opened many raised questions about its safety. Especially after watching these slide. The rides opening delayed at least three times while the park reworked it adding seat belts and safety netting. Quite possibly this incident is not going to be a result of a mechanical issue, more possibly a result of an human error. Reporter and the park will be closed today as a team of investigators works to figure out what exactly what went wrong here. Thanks, alex. Joinedow ceo of the National Safety council, deborah hersman. Thanks for joining us. So many question raised by this accident. The company had taken many steps to put in Safety Measures before the ride opened. But what kind of questions are you asking right now . Whats on top of your mind . You know, i think first really is to let that investigation play out. Its good that theyve closed the park but we really want to understand what happened here and giving officials the time they need to do the properly will give us a lot more answers. They added seat belts. They added safety netting. They had weight requirements. So is this more likely human error . You know, i think its really too early to tell. We really dont know what happened. Very tragic event here. People come to parks, water parks, amusement parks hoping to have fun but they certainly expect a safe ride so we want to make sure whenever everyone goes to a park that they do follow th restrictions, that they dont try to loosen up the restraints and definitely if youre going to a water park make sure you know how to swim. Have we had many problems with water park as cross the country . You know, the good news is we dont see fatalities. Theyre so rare but we do see injury, but theyre also very infrequent. We know that some of the places that can be really dangerous in summertime are around water so making sure that when youre how to swim, parents, you want to make sure that youve got a close eye, close hand on your children. We see some injuries occur in pools every year and we see people die because of drowning. But certainly some serious injuries can occur on places like slides and so whether humans are involved or whether its equipment, you really want to be careful. We see head, neck and back injuries on slides. This ride was called insane. Are park operators taking you know, i think, you know, the question really is, is the ride safe . And if the ride is safe, we want to make sure that everyone who rides the ride is safe. And so taking the precautions that we need, if there are changes that need to be made im sure this park will be looking closely at that. But ultimate theres also some responsibility for local and state authorities to take a look at it, as well as the manufacturers to ensure that for joining us this morning. Thank you. So lots of questions to be answered but, boy, our hearts go out to that family. Absolutely. So important to think about those things she said. We move on now to the race for the white house and donald trump struggling to get back on track after a tough poll number. Our new poll Shows Hillary clinton with an eightpoint lead as trump steps up his attack. Abcs tom llamas tracking it all for us. Good morning, tom. Reporter lara, george, good morning to you. Donald trump and Hillary Clinton will be economic plans this week as trump is using clintons own words against her. This morning, as some wonder if Trumps Campaign is coming unhinged, the republican nominee lobbing that same attack on Hillary Clinton. She is a totally unhinged person. Shes unbalanced. Honestly, i dont think shes all there. Reporter trump seizing on this statement clinton made about her truthfulness discussing her email server. That and for that i, you know, will try to clarify. Reporter the Trump Campaign posting this on social media portraying clchts as a robot. I may have shortcircuited it. Reporter and trump having a field day with that shortcircuit comment. She took a shortcircuit in the brain and shes got problems. I mean, if we had real people, this would be a real problem for her. But i think this country dont want somebody that is going to shortcircuit up here. Okay. Not as your president. Reporter trumps new attacks come on the heels of new polls that show him in a summer slump. Our abc News Washington post poll showing many voters worried about trump. Twothirds say he has the wrong temperament. Almost as many say hes unqualified and untrustworthy. Regards to trumps relationship with russian leader vladimir putin. For mr. Trumps perspective, right, he simply heard putin compliment him. He then responded by complimenting him. He never thought that he might be being played. Reporter trump firing back on twitter calling morell, a man who has made some serious bad calls and a total clinton flunky. And today in detroit trump will unveil his economic plan. We have a trumps want to repeal and replace obamacare and limit taxation of business, all businesses to 15 and stop all payments using tax dollars to the u. N. Global warming programs and also exclude child care expenses from taxation. Now, the Clinton Campaign is already calling this tru trumponomics saying if he wins, you lose. Thanks very much. Lets bring it to matt dowd. Today, an economic speech, Biggest Issue focused on jobs and trying to consolidate republicans with a lot of ideas that have been republican orthodoxy for a long time. Yeah, i mean i think hes much better arguing on the ground of the Economic Situation in the country today instead of this argument around the shortcircuited situation. If i were donald trump i would not get into an argument about mental stability. Its not a ground i think is very good for him in this. He m in this speech he has to do the equivalent of jim furyks 58 yesterday which was an amazing situation set the alltime record, in order to break this pattern, hes going to have to hit it out of the park. Out of the park and one speech alone isnt going to do it. The question is can he stay on message for a consistent series of days and weeks . At the same time, youre saying, you know, as we look at our poll. There is an eightpoint lead for Hillary Clinton in our a race. You think over time those the Green Party Candidate and gary johnson, the libertarian candidate can have an impact. Yeah, i think unlike years past, you know, where the third or fourth party dwindle as they get closer to election day i actually think theyre going to rise as we get closer to election day. I think because of the dissatisfaction as we see in the abc poll with both Major Party Candidates and the fact theyre both unliked and distrusted means theres an opportunity for Gary Johns Jill Stein to grow their support. The question, george, is can they get enough support to get in that debate, that first debate in september . I think its unlikely but thats really the threshold they need to beat which is 15 . It worked for ross perot back in 199. Finally, Hillary Clinton stepped in it again over the weekend with those new comments about the email server. How does she hold on, consolidate the lead she now has . Dont go on the air. I think the best thing that she has done in the course of this consistently done and consistently made mistakes and as shes disappeared her poll numbers rise and that is pretty consistent over the last eight years. As she goes off the media platform her numbers rise so if i were her cede to donald trump and let him do what hes doing. Go to the states. Local media strategy, matt dowd, thanks very much. Never a dull moment. Same thing in rio where americas olympians are hitting their stride taking home two gold medals in spectacular slowing down. Amy is live in rio with all the latest. Good morning, amy. Hey, good morning, lara. And george, team usa going for gold and breaking records along the way with incredible performances in the pool and on the balance beam and this is the best part, theyre just getting started. The United States will win gold. Reporter the u. S. Mens swim team struck gold sunday night, Michael Phelps, the most decorated olympian of all time team to victory in the mens 4x100 freestyle relay. With this win phelps has now everyoned his 19th gold medal and 23rd overall medal in the olympic games. Phelps teammate ryan held overcome with emotion on the podium. The olympic veteran no stranger to hearing the starspangled banner put a comforting arm around the gold medal newbie and shining bright 19yearold american Katie Ledecky winning gold crushing her competition. Canidate ledecky smashes her own record. Reporter favored to win broke breaking the world record and beating her closest competitor by five seconds. Only 15 when she won gold at the london games now being called the female phelps. Other american stars also making waves include fourtime Gold Medalist dana vollmer, year and took it in the 100meter butterfly. Cody miller also taking home bronze in the 100meter breaststroke. And the womens Gymnastics Team decked out in stars and stripes dominating all the events at the qualification round. On the bar, the vault, the beam and the floor. Ending the night in first place and simone biles making her much anticipated olympics debut led the charge. Standing teams smallest member came out with the biggest scores. Even showcasing her signature move, the biles. And on the Tennis Courts serena and Venus Williams lost their first round match in the doubles competition. A shocker in rio. Reporter but serena won earlier in the day beating her australian opponent in straight sets. Now the four time Gold Medalist track to add to her collection. All right and a big moment in the pool, take a look at russian swimmer yulia efimova. Take a look at u. S. Swimmer lily kings reaction as she beat her time and calling out yulia for being caught occupy in the russian drug cheating scandal. A lot wonder why shes been allowed to compete. Competition is fierce. Guys. Oh, i cannot stop watching, amy. You are so lucky to be there. Great job. Want to get to jesse palmer now with a look at where things stand in the olympic medal count. Give it to us. I cant stop watching either. Heading into day three at the rio olympics and today some real opportunity force the u. S. To bring home even more medals including, of course, gold. Right now americas in the lead with 12 medals including three goal, five silver rounding out italy and japan right now tied with seven apiece. But big day today, all eyes on Michael Phelps as he competes in his first individual competition. We saw him, of course, add to his record medal tally last night with a win in the team relay but youre also going to want to keep an eye out for the u. S. Mens gymnastic team, the final today looking to do what they could not do in 2012 in london and that is bring home a medal. Lara, george. Thank you. Now to rob. Just east of l. A. On gma. The latest on that murder mystery here in new york. That jogger killed on a run. Her parents are now speaking out. Theyve got a message for the killer still on the loose this morning. New trouble for Oscar Pistorius in prison, the form he olympian rushed to the hospital for injuries to his wrists. Did he hurt himself . What his brother is saying about it this morning. My doctor prescribed medication an opioid. It really helped but it came with some baggage opioidinduced constipation oic. For movantik movantik . Yes, movantik opioids block pain signals. But can also block activity in the bowel, causing constipation. Movantik is specifically designed for oic. Do not take movantik if you have a bowel blockage or a history of them. Serious side effects may include a tear in your stomach or intestine. And can also include symptoms of opioid withdrawal. Common side effects include stomach pain, diarrhea, ctor about any side effects and about medicines you take as movantik may interact with them causing side effects. 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