Split second. And reduced to rubble. A famous ancient rock formation destroyed, toppled by tourists. Now, the hunt to find them. Good evening. Im cecilia vega. David is on assignment. We begin this labor day with breaking news on the campaign trail and the allout sprint to the election. Hillary clinton on her Brand New Campaign plane for the first time. The candidate, who hasnt held a press conference in 275 days, late today taking questions from reporters, where she dismissed attacks about her health. Today, alone, clinton making as Many Campaign stops as shes made in the last two weeks combined. Her team fanning out, too. Running mate tim kaine, Vice President joe biden, former president bill clinton, even her onetime foe, Bernie Sanders, all out enforce today. It made for a crowded scene on the tarmac in cleveland. Clinton and trumps planes parked right there next to each other. Donald trump making headlines tonight, too, saying he will attend all three debates. But we begin tonight with abcs david wright, leading us off in cleveland, with just 63 days to go until this election. Reporter tonight, as the final push begins, Hillary Clinton finally answered questions from her traveling press corps, including ones on russia, china and her health. Are you concerned about conspiracy theories about your health and if that will affect the election if. Im not concerned about the conspiracy theories. There are so many of them, ive lost track of them. Reporter todays question and answer session was her first in weeks. It took place aboard clintons Brand New Campaign plane, a boeing 737 nicknamed hill force one. Clintons slogan, stronger together, em plblaze sonned there on the side. Hey, guys. Welcome to our big plane. So exciting. Everything i did at the state department, i did in fourth rans of americas interest and our security. The state department has said theres absolutely no evidence of any kind of external influence, and i know that to be the fact. Reporter Clintons Campaign has more events scheduled today than theyve had for the past two weeks. Team clinton swarming the end zone in six states, including Bernie Sanders first solo stops on clintons behalf in New Hampshire. There should be no doubt on anybodys mind as to whether Hillary Clinton is the superior candidate, because in every respect, she is. Reporter at a labor day picnic in cleveland, clinton was suddenly overcome by a coughing fit. Every time i think about trump, i get allergic. Must be allergic to the media, tweeted Trumps Campaign wryly. Finally spent a minute with them. And david wright joining us in cleveland. Hillary clinton not letting up on Donald Trumps trip to mexico. Shes accusing him of choking on that big trip there . Reporter thats right, cecilia. Clinton and her running mate, tim kaine, sat down with our friend david muir, and talked about the trip to mexico, saying he choked, calling, saying he caused a diplomatic incident, by telling the mexican president one thing and his supporters another, calling that irresponsible. Cecilia . David wright leading us off tonight. Thank you. And a reminder just how tight this race is, clinton now holding a sixpoint lead over donald trump, thats found from a tenpoint lead in early august, and as both candidates know, it is the battleground states where this race will be won or lost. Heres abcs mary bruce. Build that wall reporter tonight, donald trump kicking off the final sprint of the campaign. Shaking hands at this county fair. Were going to bring jobs back to ohio, were going reporter trump blitzing the key battleground state where latest shows show clinton with a slim lead. And on his way, a rare move for trump, inviting the press to tag along on his plane. The same day Hillary Clinton started traveling with her press corps. Coincidence . That what shes doing . I didnt know that. To become a citizen, youre going to have to go out and come back. Reporter but when pressed further, still not giving a clear answer. Were going to make that decision into the future. Reporter trump slamming clinton for ducking reporters, counting the days since her last press conference. She doesnt do press conferences. Its been almost 300 days. Reporter if Hillary Clinton held a press conference, what would you ask her . A lot of questions to ask. Reporter hell have his chance later this month. I think we have an obligation to do the debates. Reporter trump confirming he will attend all three debates. As of this moment, yes. What could cause you to change your mind . Hurricanes, natural disaster. No, i expect to do all three. Reporter and with just 63 days until the election, hes taking new shots at clinton. She looks president ial. Hillary clinton would be a disaster. And mary bruce is with us from canfield, ohio. Donald trump dropped some hints about how hes preparing for that debate, the first one in just three weeks. Reporter yeah, dont expect any traditional debate prep from donald trump. No mock sessions, no one playing clinton inner are hearsals. Today trump expressing concerns about being overprepared. Cecilia . Mary, thank you. And david muir will be back here tomorrow night with Hillary Clinton and tim kaine, as well as the republican ticket, donald trump and mike pence, first on gma, on abc news digital and of course on world news tonight tomorrow night. We want to turn now to the extreme weather. Hermine packing a punch this labor day weekend. Look at the high surf off rhode island. Coastal flood threats and Tropical Storm warnings tonight along the coast of new england. At least two people killed, including the driver of this tractor trailer, blown over by a gust of wind on a North Carolina bridge. And in florida, where hermine made landfall as a hurricane, tonight, tens of thousands of residents still without power. Abcs ginger zee with the storm track in a moment, but first, abcsitez on the jersey shore. Reporter tonight, winds from hermine still packing a punch in parts of the northeast. In cape cod, massachusetts. Whipping across the beach, waves are picking up. No swimming ban in effect. But a surprising number of people are actually out here. Reporter royal caribbeans anthem of the seas got caught in the rough waters. They got out of it safely, but on the shore, rough, dangerous search. And lifeguards warn, it could be deadly. As soon as you get waist deep, you are swept down the beach. Reporter and all of those businesses along the eastern coast, fire island already saying theyve lost millions. And look at these empty beach chairs on the jersey shore. The beach itself, even more barren. And small businesses, like the gables hotel and restaurant, taking a hit worth tens of thousands. The phones were ringing like crazy and there was a mass exodus from the island. Reporter a mass exodus. And so, here are you, left with all these open tables that would have otherwise been filled. I know. I know. And people miss their holiday. Reporter and cecilia, in the next few days, expect those dangerous rip currents and those big, rough waves are going to keep tearing down these massive dunes. Of course, theyre going to need some repair for noreasters in the fall and winter. Cecilia . Okay, gee yo, thank you. I want to bring in ginger zee. You have been tracking this for so long, and its not over yet. Reporter feels like forever. And, yes, weve been tracking this system for weeks, cecilia. Lets look at it. Hermine, still a posttropical smile clone with max sustained winds of 70 miles an hour. It will weaken as it keeps turning back towards eastern long island, all the way through cape cod. And thats why we are still paying attention to this. You pile on water for two, three days, and you are going to erode those beaches, major rip currents. I wanted to show you this. We will see some rain bands coming out of this, 20 to 40mileanhour gusts with it and the shield of clouds makes it athe way back into parts of new jersey. Then, we go to the middle of the nation, weve had big issues with Severe Weather the last 24 hours. Now flash flood warnings for p minneapol minneapolis. A quick look, hurricane newton, headed for cabo san lucas. Ginger, thank you. Overseas, president obama has landed in laos. The visit comes on the heels of the g20 meeting, opening with controversy on the tarmac and ending with a diplomatic showdown with vladimir putin. Abcs bob woodruff is in the region for us tonight. Reas reporter today, tense moments on the sidelines of that g20 summit. President obama face to face with vladimir putin. The tone of our meetings are candid, blunt businesslike. Reporter a 90minute meeting, tackling everything from Cyber Security to a syrian ceasefire, between russianbacked president al assad and u. S. Backed rebels. But so far, no deal. Given the gaps of trust that exist, thats a tough negotiation. Reporter that meeting on the final day of a summit that kicked off with an awkward scene on the tarmac, chinese officials did not provide the traditional staircase and red carpet reserved for world leaders. Instead, president obama had to exit from small stairs at the belly of the plane. Mr. Obama is now in laos, where he was scheduled to meet with the philippine president , now can receiving that meeting after the philippine president used a vulgar term, threatening to curse out president obama in person if he continued to question his states controversial killing of drug suspects. Clearly, hes a colorful guy. Reporter now, obama will be the very First American president to ever visit the country of laos, and he will be stepping up the u. S. Commitment to removing tens of thousands of those cluster bombs that have been left in the ground after being dropped by the United States during the vietnam war. Cecilia . Okay, bob, thank you. And just 650 miles away from where president obama was in china today, an act of aggression from north korea. In a show of military force, kim jongun firing off three missiles toward japan. No warning given by the north korean government. The whouls promptly con contempting what they called as a reckless act. And back home now, to that controversial quarterback and his National Anthem protest. Tonight, two high profile defenders coming to Colin Kaepernicks side. President obama weighing in, calling it the nfl stars constitutional right to kneel in protest. But its what one female soccer star did on the field and what shes now saying off the field that is turning heads tonight. Heres abcs kayna whitworth. Reporter tonight, 49ers quarterback Colin Kaepernicks refusal to stand during the National Anthem is gaining steam. Even the president was asked about it. Hes exercising his constitutional right to make a statement, i think theres a long history of sports figures doing so. Reporter u. S. Womens National Soccer team player megan arapinoe, kneeling before her game, calling it a nod to kaepernick protest of racial injustice. Saying, being a gay american, i know what it means to look at the flag and not have it protect all of your liberties. How long do you plan on continuing to take a knee and will it be taking a knee . I think at this point it will continue to be taking a knee. As far as how long this goes, im not sure. You know, i want i want to be able to affect change. Reporter support is growing for the embattled quarterback. The 49ers saying more kaepernick gear was sold last week than in the past eight months combined. He is receiving heavy boos here. Reporter one group voicing dissent. The Santa Clara Police union, saying they may not provide security for games because of his statements about police. Now, the Santa Clara Police chief has reminded his staff that kaepernick is expressing his First Amendment rights and its their job to uphold that and provide public safety. Cecilia. Kayna, thank you. Next tonight, imagine the horror of watching a thief taking off with your car, your daughters in the backseat. Abcs Steve Osunsami has more. Reporter Georgia Police tonight are looking for a thief and a car jacker, seen in a video from this gas station surveillance camera, steaming a car with two twin 1yearolds inside. Ten steps away from the car. Obviously enough for him to get in the car and take off. Reporter their father, lester chaney, couldnt get his credit card to work in the pump. He ran back to the car when he saw the sheaf. Whoever stole it abandoned the car a quarter mile away. 1yearold mackenzie was in her car seat in back, her twin sister, nadia, was found here. These arent the first kids kidnapped during a car theft. This mom ended up jumping on the hood. Her daughter managed to get out. And the lady was like, who is that getting into your car . I turned around, hes already in the car, closed the door. Reporter in florida, another mother is seen on surveillance video, fighting off two armed men, allegedly trying to steal her car with her 1yearold daughter and 7yearold son inside. Police say the girls here in at land that slept through the whole ordeal. The father warns other parents tonight is that you should never leave your car running and unlocked like he did. Cecilia . Good reminder. Steve, thank you. And there is still much more ahead on world news tonight this monday. Sorry to tell you, but it is back to work tomorrow. If you think the traffic on your way in is a pain, just wait until you find out how much your daily commute costs every year. And an inchent landmark toppled, crashing to the ground. Why these hikers say they did it and why authorities now want to find them. Serena williams, now topping every tennis player ever, man or woman. Hey marc, how you feelin . Dont ask. This is what it can be like to have shingles. A painful, blistering rash. I never thought this would happen to me. If you had chickenpox the shingles virus is already inside you. 1 in 3 people will get shinim going to go backme. To the eye doctor tomorrow. Its pretty close to my eye. I dont know how you do it. Talk to your doctor or pharmacist today about a vaccine that can help prevent shingles. Get between you and lifes dobeautiful moments. Llergens flonase gives you more complete allergy relief. Most allergy pills only control one inflammatory substance. Flonase controls 6. And six is greater than one. Flonase changes everything. Before it became a medicine, it was an idea. A wild whatif. So scientists went to work. They examined 87 different protein structures and worked for 12 long years. There were thousands of patient volunteers and the hope of millions. And so after it became a medicine, someone who couldnt be cured, could be. Me. Tonight, a famous rock formation reduced to rubble in just seconds, and all it took was a push from some hikers. Now, the hunt is on to find them. Heres abcs neal karlinsky. Reporter even the people who captured this video couldnt believe it. Oregons beloved Pedestal Rock formation, immortalized by visitors to the coast, toppled intentionally. They were just standing on top of the rubble of the rock, just laughing, like smiling, just giggling. Reporter park officials found the rock in pieces and thought it must have collapsed naturally. But tonight, this video captured by two men flying a drone tells a very different and troubling story. In it, you can clearly see a group of people working to knock over the famous formation, which was protected behind a fence. They basically told me themselves that it was a safety hazzard and they did the world or oregon, like, a favor that they knocked it down. Reporter its not the first time people have been caught on camera destroying beautiful natural formations. These boy scout leaders toppled a famous rock in utah, dating back to the jurassic period. Actress Vanessa Hudgens was fined 1,000 for vandalizing land by carving into arizonas famous red rocks. In oregon, the accused vandals havent been found. Park Officials Say they are now working with the state police to find out who did this. Cecilia . Okay, name, thank you. And theres still much more ahead on this labor day weekend. Dale earnhardt jr. Putting the brakes on his season, but dont worry, nascar fans, he is not going away. And good news for giant pandas. Theyre not going away, either. 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