Good evening. And its great to have you with us here on a wednesday night. And the countdown is on. Just a short time from now, donald trump, Hillary Clinton, and their third and final debate. And even before their final clash on that stage tonight, their campaign planes both right there in nevada. And lets go right to the debate hall at this hour. We have learned tonight of Donald Trumps plan, going into this evening. And the clinton team, asking the change at least one tradition, something will be different tonight. Abcs tom llamas, leading us off. Reporter tonight, tension so high, this tradition has been canceled. The candidates families will no longer greet each other before the debate. At the Clinton Campaigns request, they wont even cross paths. This, after donald trump lured reporters into a room hours before the last debate to find him surrounded by women accusing courageous women, and they have asked to be here. Reporter trumps team wanted to seat the women in the family box, so theyd come face to face with bill clinton on that greeting line. The Clinton Campaign trying to avoid anything like that tonight. But other trump stunts already underway. Trump inviting president obamas half brother, malik obama. Malik, who has a contentious relationship with his brother, is supporting trump. Tonight, trump will face tough questions on his claims the election could be stolen from him. But they even want to try and rig the election at the polling booths. Reporter today, his own Campaign Manager contradicting him. Do you believe there will be widespread voter fraud . No, i do not believe that. Reporter trumps daughter, ivanka, also weighing in. If hell either win or he wont win, and i believe hell accept the outcome either way. Reporter and trump will also have to answer to accusations that he sexually harassed and assaulted women. Believe me, she would not be reacting to that video, her father on a bus, bragging about groping women. I did find it to be offensive. He acknowledged it, as well. This tape was a decade old. He was very embarrassed by it, and he expressed that, not only to me personally, but to the american people. Reporter but tonight, trump is promising a brawl, including pointed attacks on clintons health. And focusing on embarrassing material from the campaign from hacked emails. Wikileaks. I love wikileaks. Reporter but now, a trap republican saying trump is playing dangerous games since Clinton Campaign emails were allegedly obtained by russian hackers. What i would say to our republican colleagues, some of who may be disappointed by the position ive taken, today, its them. Tomorrow, it could be us. Reporter trump telling me the man on that stage tonight will be a fighter. Which donald trump are we going to see . We saw a much more aggressive, kind of, you were in your own element at that second debate are we going to see that look, theres a lot to be aggressive about. Shes done a terrible job. A preview there from trump himself. Tom llamas with us live. Donald trump pays very close attention to the polls himself. You talked to him. Does he acknowledge the math tonight, and the turnaround his Campaign Needs . Reporter david, as you know, Donald Trumps had a long love affair with the polls, but that is no more. He now says hes not believing the polls. His campaign knows they are down in several states, and how important tonight is, and david, weve just learned of two more special guests by the trump camp. Tonight, sarah palin, the former alaska governor, and yet another bill clinton accuser. David . Tom llamas tonight in that debate hall. Tom, well see you in primetime. In the meantime, to Hillary Clinton, and new reporting here tonight. What were learning about her strategy. She plans to take it to donald trump on two major issues, repeatedly brought up by trump. His claim of a rigged election, and what trump has said about the women who have now come forward against him. Reporter tonight, Hillary Clintons team says she will go there, hitting donald trump on allegations of Sexual Misconduct and his claim the election is rigged. Clintons chief goal tonight . Staying out of the way of her own momentum. For five days, the democratic nominee largely out of sight, prepping behind closed doors with her team, knowing how much past debates have helped her in the polls. I think donald just criticized me for preparing for this debate. And yes, i did. And you know what else i prepared for . I prepared to be president. And i think thats a good thing. Reporter clintons mission . Stay calm and steady, as she did in the last debate, when trump invited her husbands accusers. Snl marking that moment. Four of those women are here tonight. Four of them. No, ill never be able to remember my facts and figures now. Oh, donald, no. Get real. Im made of steel. This is nothing. Looked at each other. The big question this time, will they actually shake hands when they come on this stage . With or without a handshake, tonight, clinton sure to face tough questions on wikileaks and her emails, an issue thats dogged her this entire campaign, and shell be challenged to present herself as a unifier. A preview perhaps . Her new ad with lines lifted straight from her last debate performance. America where everyone has a place. That is the america that i know and love. And cecilia vega with us live, as well, tonight. And cecilia, we heard at the top, president obamas half brother could be there tonight. Sarah palin planning on being there. Both for trump. The clinton team bringing their own guests . Reporter they sure are, david. Mark cuban, reality tv star, of course, Donald Trumps billionaire nemesis. He was in the front row at the also tonight, meg whitman, hewlettpackard ceo. She is a prominent republican supporter of Hillary Clinton, david, clintons team really trying to get under trumps skin with these invitations. Cecilia vega live in nevada for us, as well. And a list of new National Polls showing Hillary Clinton increasing her lead after the first two debates. And unless donald trump blocks her tonight, could clinton now be within striking distance in states that have not gone republican for years . Lets get right to jon karl. Hes in the spin room tonight, with the states were talking about. Trump tonight, the stakes couldnt be any higher. If he doesnt turn things around, he is on the verge of not just losing, but losing big. First, Hillary Clinton is leading in virtually all of the battleground states, solidifying her lead in states like virginia, pennsylvania and florida. And take a look at this. Shes even gaining ground in such republican strongholds as arizona, georgia and texas. Those are states that havent gone democratic in more than a states, we could see a landslide on november 8th. David . Donald trump setting out to change that tonight. Jon karl, thank you. Keep it right here on abc for tonights debate just a short time from now. Ill be joining george and our powerhouse political team, 9 00 p. M. Eastern here. The final showdown between clinton and trump. In the meantime, we the turn the other news tonight, and a massive gas exmraegs. Neighbors and witnesses smelled gas, and then this. Several of those neighborhood then running for cover, and tonight, many injured. Abcs Neal Karlinsky on the scene in portland, oregon. Mayday, mayday. Reporter seconds after the first explosion, firefighters could be heard calling for help, some of them clearly wounded. Mayday, mayday, mayday. Reporter in the heart of downtown portland, amidst the chaos, another in a series of blasts, this time caught on i saw the entire face of the building fly across 23rd avenue and hit the building across the street. We have one firefighter down across the street. Reporter the scale of the destruction, massive. Tonight, eight are wounded, including three firefighters. The buildings had been evacuated just minutes before because of a strong gas odor. Witnesses described three separate blasts. Officials now reporting that a contractor may have nicked a gas you could almost feel the noise, how strong it was. Reporter it comes just two weeks after a gas explosion leveled two homes in patterson, new jersey, residents smelling the gas there, too, and evacuating before the blast. Tonight in portland, people who saw and felt the triple blast and made it out unhurt are just thankful no one was killed. Looking at the scope of the damage, it is remarkable that everyone made it out. Two of the three firefighters suffered broken legs in the blast. The cleanup and the investigation are just getting started, david. Neal karlinsky in oregon for us. We turn now to the urgent manhunt at this hour, after a school shooting. A suspect opening fire on students as they left high school. Abcs Adrienne Bank ert is in San Francisco. Reporter tonight, police in San Francisco say they are close to making an arrest after a brazen shooting outside a high school that wounded four students. This is not just a random shooting, a didnt come here just to randomly shoot at any of the students that are here. We are getting more calls from inside. Five gunshots heard. Reporter gunshots erupting just as school let out yesterday. I saw people running through the hallways, i thought it was a joke. Reporter panicked students running back inside, the school on lockdown. When officers responded immediately, they thought this was an active shooter because they saw the victims inside the school. Reporter Police Believe gang members targeted the 15yearold student who was most seriously injured. Students still stunned when they shocked to see this happen. I went home last night and i hugged and kissed my kids so tightly. I have a heavy responsibility to create safety. Reporter david, three of those students have been released from the hospital. And that 15yearold girl shot in the chest is expected to survive. David . Adrienne bank ert in california. Overseas tonight in afghanistan, a deadly attack inside a coalition base in kabul. Two americans, a u. S. Service member and a civilian were killed, and three other americans injured in what the attacker reportedly wearing an Afghan Military uniform. Troops returned fire. The attacker was killed. And to our team on the front lines in iraq tonight. At this hour, americans helping the iraqis in their offensive to take out isis. And our team witnessing the oil fields on fire. Abcs Alex Marquardt in one town just taken back from isis. Reporter driving towards mosul today, the skies darkened. Scene. You can see the sky right there has turned completely black, because all across this battlefield, like right there, isis has been setting fire to oil wells for cover. This dusty road leading to a town taken back from isis just two days ago. We just heard a loud boom that felt like it was coming from under the car. It was a more or the that landed nearby. Three miles from the front line, a small group of families fleeing the fighting. Some with white flags. Gathered around the bodies of two local isis militants. You can see the people from the town gathered around, celebrating. Many taking selfies and flashing peace signs. Among them, this 16yearold, who tells us that for two years, isis could woman to his house to arrest and execute him. He would hide in his bedroom. He and his friends not free of isis, but many other villages and mosul itself, for now, they are trying to consolidate and even out the front line as they advance towards the city limits of mosul. Its only then that the fiercest fights will begin. David . Alex, thank you. We are also following a disturbing image outside a u. S. Embassy in the philippines tonight. A police van, right here, plowing wildly back and forth through this crowd of protesters. Several people were hospitalized. The driver telling reporters that he was trying to get away from to test or thes who were those protesters wanting u. S. Troops to go home. And in prague tonight, a russian man suspected of Cyber Attacks in the United States is now under arrest at this hour. Local police cooperating with the fbi in a raid of a Hotel Restaurant in downtown prague. Sources telling abc news he is wanted in connection of a massive breach of user information on linkedin. Back here at home tonight, and to your money this evening, American Families know the fees theyre paying up front when they book a ticket. Tonight, the changes, and the simple tips for you. When to book your flight to get the cheapest fare, especially with the holidays coming. Abcs rebecca jarvis, taking your money tonight. Reporter if youve ever waited and waited this is ridiculous. Reporter to reunite with your luggage after a flight, your time might be worth some money. President obama nudging airlines to start refunding baggage substantially delayed. No word yet on why flyers will see refunds, but there are ways to save time and money as you book those holiday flights. Youve got all these apps and tools and resources you can use. Reporter for example, Google Flights and the hopper app, which claims it can tell you with 95 accuracy exactly when to book your flight. It says it can save the typical traveler 50, or even as much as it will send you notifications when the flights go up in price or down in price and tell you when the prime time to book them is. Reporter plus, theres freebird, a kind of insurance for your trip. For about 19, it will automatically rebook you, even if you miss your flight due to delays. And david, one more tip for you, remember to look at two oneway fares, not just round trip. It used to be that round trip was the cheapest, that is not necessarily the case anymore. All right, were going to save somne world news tonight this wednesday. The plane crash. Rescuers on the scene tonight. The plane just missing several homes. And this is news this evening about the people onboard. Also, the verdict just in in the rape case against nba star derrick rose. Well have late developments. And you have to see america strong tonight. 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Stop taking viagra and call your doctor right away if you experience a sudden ask your doctor about viagra single packs. Next tonight here, to growing outrage over a man arrested for walking in the street. The sidewalk was under construction. A black man confronted by a white officer, and then arrested. Now, the national outrage. And heres abcs alex perez. Its a crying shame. Hes the lieutenant of your police department. Reporter packed into a city council meet, unleashing their frustration. If this is the protocol, then the protocol is racist. Reporter theyre angry about that video, showing t. Olson attempting to stop larnei thomas from walking on the shoulder of the road. You cant just put your hands thomas was not moving. Reporter at the meeting, the mayor says he plans to apologize to thomas in person. Its one thing to sit up here. Its another thing to tell him face to face. Reporter but Officials Say the officer followed protocol, and will not be disciplined. 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