Preparing to compete. The troubling results that would close any American Beach and why one of team usas famous athletes were taunted overnight by thousands of olympic fans. And good morning, america. Okay, theres no Opening Ceremony for the olympics yet but already a pretty ugly scene. You saw it last night. Hope solo really getting booed as she went on the field and did turn out okay for the u. S. Big victory over new zealand. See the goal there. We conducted our own investigation into rios water, those results are coming up, as well. First well begin with that breaking news overseas. A deadly attack in london. An American Woman has been killed. Five others injured. A suspect is now in custody and london is on edge as police step up security on the streets there. Abcs Alex Marquardt is on the scene with the latest. Good morning, alex. Reporter good morning, robin. Thats right. This attack happened right here in Russell Square in the heart of Central London at the height of tourist season. Just moments ago londons police saying the suspect is is norwegiansomali origin. Excuse me, robin. Reporter security stepped up. Police cordons around Russell Square in Central London as investigators comb through the scene of this gruesome knife attack. Police were called just after 10 30 p. M. Reports of a man on a rampage. They discovered the female victim in her 60s fatally wounded and five others injured. Early indications suggest that Mental Health is a significant factor in this case. And that is one major line of inquiry. Reporter overnight one of the biggest security responses the city has seen since this same square was targeted in one of the deadly bombings in the summer of 2007. I could hear the policeman screaming, stop dont move. Dont go any further. Stay where you are and he turned around and continued running. Reporter this as london braces for a terror attack that Authorities Say is all but inevitable. This week deploying 600 additional heavily Armed Police Officers into the streets of the city in the wake of the recent wave of attacks in europe. So, even though there are no links to terror, this is still very much a city on edge. Among the wounded there were five wounded, there was one american, this morning londons mayor calling on citizens to remain calm and vigilant. Robin, george. Alex, thank you very much. A lot of chaos. Sure is. The race to the white house and questions swirling around Donald Trumps campaign. He says its never been better but Top Republicans are in panic mode as a new fox news poll Shows Hillary clinton with a tenpoint lead. Trumps Campaign ChairPaul Manafort here in the studio after jon karl brings us the latest. Good morning. Reporter good morning, george. Trumps allies are desperately trying to get their candidate back on message. So far the results have been mixed but even with the chaos, Trumps Campaign is rolling in the cash fueled by a massive infusion of small dollar donations from his supporters. Its donald trump versus mike pence. While trump has infuriated fellow republicans by refusing to endorse paul ryan, speaker of the house. Trumps own running mate is eagerly endorsing him. I strongly support paul ryan. Strongly endorse his reelection. I believe we need paul ryan in leadership. Reporter even with chaos swirling around his campaign, trump insists things couldnt be better. The campaign is doing really well. Its never been so well united. Reporter not only does trump insist hell win, he suggests a loss would be almost unthinkable. Wouldnt that be embarrassing to lose to crooked Hillary Clinton . That would be terrible. Reporter voters he said simply must vote for him. If you dislike me intensely, if you say, i would never in a million years vote for donald trump, you have to. You have no choice. Reporter his confidence given a boss boost by a big fundraising haul in july, 2 million. But trump trail as clinton by ten points conducted in part before this weeks cascade of missteps and controversies. It was that feud with the parents of a fallen american soldier. Then suggesting women who are harassed at work should find a different job. Then this claim about the purple heart. I always wanted to get the purple heart. This was much easier. Reporter overnight in jacksonville, florida, trump touted his gift yet again. I took it. I said i cant believe it. Its one of the most beautiful things that ive ever received and from the heart, so much from the heart. Reporter Newt Gingrich, one of trumps most reliable allies offered a blunt critique. Some of what hes done is very selfdestructive. Reporter democrats are hitting him for suggesting the election might be rigged. I would just note it is often a claim made by people who dont end up winning elections. Reporter Reince Priebus has repeatedly tried to get trump to publicly apologize to the family of captain khan. Trump has not done that. But, george, over the past 24 hours he has not attacked the family again either. Okay, jon, thanks very much. Lets talk to mr. Trumps Campaign Chair, Paul Manafort right here joining us. Thank you for coming in. George. Lets pick up where jon left off. In that fox news poll it also shows that 70 , almost 70 of the voters thought that those comments about the khan family were out of bounds. Why not apologize. Well, i think mr. Trump has paid the respect. Its just nobody is acknowledging it. He hasnt apologized. What he said is that he respects and totally sympathetic to the sack fights that family made talking about the son and the family. And, you know, beyond that i think its politics. I mean, the driving of what the right words are. He is appreciative of their efforts. And but he receives them as part of something thats a part of a bigger thing which is the campaign and the issue of isis and the issue of the mismanagement of foreign policy. Thats what hes campaigning on. Hes not campaigning on the khan family. Hes campaigning on the hes hoping to move on without an apology. Hes expressed his sympathy and expressed his support for what the family is going through. I mean its like the same thing caught up, whats the difference between i support you and i endorse you, we quibble over the words and the sentiments are there and the sentiments about what he feels towards that family and what theyve went through he expressed. Just because he doesnt say the words Everyone Wants he said hes sorry for what theyve gone through but keeps going back to the main issue and the main issue isnt this family, its the main issue that caused the suffering of this family which is the war in the middle east, destabilization and policies of obama and clinton that caused them. He said that the campaign is you nyed. Never been doing so well. Front page of the washington post, gop, new level of panic over trump. One of his allies negresco is quoted in that article saying he cannot win the presidency operating the way he is now. Isnt that right . Look, last night he spoke in two events in florida. One had 10,000 people, another 15,000 people and its august. I mean, these are crowds you see at the end of september, beginning of october so the support for mr. Trump is there. The Campaign Messages are worked out. The themes of this campaign are settled. We know will he follow them, is the question. He will with, i think he is trying messages out on the campaign trail, you know, hes been very successful in the primaries. He draws his strength and his messages from the interaction he has with the public and hes doing that right now. He has a strong core of support no question about that but as you go into a general election you have to build on that. That doesnt seem to be happening. Oh, its building. Thats i mean, look, we framed the election. The convention did that. This is a change election. The stakes of the election are do you want more of the same, a third term of obama which would be clinton and the American People show they want change and the American People consistently show they dont think she can bring the change and that hes the change agent. He hasnt been talking about that. The last couple of days he has if you were down in florida but this time in august weve been through this and tried different approaches out. September, october, you have your messages honed. The strategy set. We know what it is. And the Hillary Clinton cant change her position in that context. One of the messages that mr. Trump has been putting out, he warned several times this election is going to be rigged. Is that a real concern . Is it responsibly suggesting that the outcome of this election might not be legitimate. Well, its i mean hes concerned about several things. I mean hes concerned about the coverage of the election. I mean which is part of the election process. His opponents say hes gotten 2 billion in free media. But, for example, 12 the two conventions when you hook at the analysis of the coverage of the two conventions, Republican Convention got 12 times more negative coverage than the democratic convention. Thats not a rigged election. But that rigs the process if the messaging is onesided. If the message is taking their narrative from one side of the campaign that affects the messaging absolutely. Now do we think we can overcome that, yes, we do but at the same time its a real issue to him. And finally youve heard jon karl report on Reince Priebus, the chairman of the rnc has been a strong ally of mr. Trump. Is livid about his refusal to endorse paul ryan. Will we see an endorsement . Has he spoken to mr. Priebus. Reince priebus is a strong supporter and a good friend and supporter of paul ryan and hes been abridge to between the party and the campaign since mr. Trump became the presumptive nominee in april and spoken several times in the last two day, theyre very good friends and have done a lot of things together, you know, theres a conflict within the trump campaign. And weve sort of had a rule of not getting involved in primaries because its usually not a good situation for the president ial candidate. Of course, hell work with paul ryan but ryan is running against somebody whos not going to win but nonetheless is a strong supporter of mr. Trumps. Its not just in paul ryans district, that gets all the notoriety because hes the speaker. Mr. Manafort, thanks for joining us. Thank you. Now to the Severe Weather across the country. Flash floods in arizona and the carolinas and hurricane earl making landfall in belize overnight heading for mexico. Ginger tracking it all. Good morning. Earl made landfall just near belize city and now is moving west. And i think the major concern here is even as it decrease, its no longer a hurricane or becomes that. Just a Tropical Storm and depression, its the heavy rain and can still have a foot of rain fall. Speaking of that, more than 7 fell in charlotte, north carolina. Check out this video and one of the rivers going up to 20 feet quickly in hours and video out of arizona right at the mexican border. Theyre also seeing flash flood problems the next couple of days it becomes more and ill detail where that happens in just a couple of moments. Rob robin and george. The first case of a u. S. Police officer arrested for supporting isis who is a d. C. Transit cop charged with trying to help the group, trying to help the terror group by buying them gift cards. Abcs mary bruce has the story. Reporter this morning an alarming first. A Police Officer charged with aiding isis. The fbi allegedly catching Nicholas Young in the act. The fbi saying the 36yearold thought he was selling hundreds of dollars of prepaid phone cards to an isis operative. But it was really an undercover fbi agent. Officials wednesday raiding his fairfax, virginia, home searching through his belongings. Its very, very disturbing. Reporter neighbors describe him as a loner. Im not shocked because he was so weird. He was just so secluded and kept to himself. Reporter officials who have been tracking him for nix years say young was part of a radical network and previously associated with Amine El Khalifi seen in this undercover fbi video readying an attack on the u. S. Capitol. Now, despite youngs close ties to one of the nations largest transportation systems, Officials Say he was never a threat to commuters here. If convicted, he now faces up to 20 years in prison. Robin. All right, mary, thank you. Plow to the latest on that crash landing in dubai. Were getting a firsthand look at what happened after the airliner hit the ground surrounded by smoke. The 300 people on board thankfully were able to escape. Abcs david kerley has the latest. Oh. Reporter a belly landing, the jets right engine ripped away, but that wing without an engine may be leaking fuel and then this. An explosion. The wing tank blasted upward in a ball of fire. Just minutes earlier, panic in the cabin. An emergency evacuation on the emirates 777. Leave everything, please jump and slide. Reporter but passengers opened bins to grab their luggage before finally jumping down the slide only to see the other engine on fire. Emirates 521 had a normal flight from india to dubai with 282 passengers and a crew of 18. As the jet approaches, no sense of emergency from the pilot. Cleared to land onetwo left. Reporter but 12 seconds later in an unconfirmed recording the piltower tells th pilot to climb which he acknowledges. 15 seconds later the pilot of another plane is stunned seeing the jet slam onto the runway. You can see the gear doors are closed. Reporter behind those doors the landing gear, former ntsb lead investigator tom howdard. Mechanical just jump out at me at the moment. Leads to pilot error. Some kind would be clear from this. Reporter still this morning emirates irlines wont acknowledge much less say the landing gear wasnt deployed. A transmission of the black boxes they got. Ntsb and fbi investigators make that ntsb and boeing investigators, george, are heading to dubai. Okay, thank you, david. We move on to the olympics. Kicking off the Opening Ceremony tomorrow in rio as concerns grow over the Water Quality and whether it could be Athletes Health at risk. Matt gutman has the latest. Reporter one of the Biggest Health concerns is the water of that gorgeous bay behind me. We had it tested and Scientists Say they found levels of a virus 200 times higher than what we would consider contaminated in the u. S. And those Scientists Say that those environments leach even into the sand here. This morning, new questions about the safety of the water some 1,400 athletes will compete in as they vie for olympic gold. Brazil had promised a massive cleanup of the guanabara bay when the sailing events take place. One day away, these images, fete tid debris and a layer of scum and last week a corpse spotted in the bay and advising athletes who go into the water not to swallow it, to cover open wounds and wash immediately after they get out. Abc news chief health and medical editor dr. Richard besser saw that sewage firsthand from above. Its pure [ bleep ] going right into the river. Yes. And from the water taking two samples. One from the shore of the guanabara bay and another at the copacabana beach where marathon swimming will take place and bringing them both to a lab outside rio for testing. Our testing snapshot of the water found virus and fecal b k bacteria levels far above what would get a u. S. Beach closed. My kids, i wouldnt let them go interthese waters. Reporter while the copacabana sample shows high levels of viruses that indicated sewage pollution. A commercial Environmental Testing laboratory in new york had this to say. The diseases that could affect people that are exposed to these types of pathogens to be an acute respiratory disease like typhoid, help tight is, gastroenteritis, dysentery and even ear infections. Reporter and thats not the only problem that organizers have encountered here. Still over a million tickets unsold, so many that organizers have actually given away 240,000 of them to underprivileged children here. Guys. All right, now i want to show you this is the suit right here antimicroial and seamless. The rowing team will wear these for protections. We have one intern wearing it. Where is showbiz. The legs are uncovered. Will these help, matt. Reporter theres a lot of skepticism. They look great but the biggest concern is that people will ingest that dirty water and no suit can fully protect against that. Lara. All right. Yeah, you think there might be something is it comfortable . Can you move . Do you have a lot of freedom . Its tight. I think thats a good idea. Thank you. Over to ginger. Boy, look at those fires. That poor thing, im sorry. The cold fire in yolo coal fire doubled since tuesday. Thats all we have time for lets get to your sunny cities brought to you by macys reporter hey everybody, david murphy here with an update from accuweather. It is another beauty building across the region. Nothing on Storm Tracker 6 live double scan. As we look outside, clouds here and there, overall were looking at blue skies early. Sunshine coming up, low humidity and temperatures in time 60s right now. The exclusive accuweather sevenday forecast high of 84. Humidity stays low. Sunny and nice. Tomorrow, warm, sun, 84. The humidity will creep upwards could be a latenight thunderstorm. Hot and sticky, more storms saturday. Killer. The driver behind the wheel during this horrific crash is speaking out for the first time. And youre talking to your doctor about yo