Nightly news begins right now. From nbc news World Headquarters in new york, this is nbc nightly news with lester hoflt. Good evening. Exactly two weeks from election day, the center of gravity in this contest tonight rests in florida, where both Hillary Clinton and donald trump battled for votes today. For trump, behind in virtually every poll, the path to victory starts and ends in florida. A mustwin. The latest florida poll released over the weekend has clinton ahead by three points. Today clinton tried to force her advantage by targeting early voters there, while trump tried to pounce on a potential new clinton vulnerability. Lets begin with nbcs Hallie Jackson in tallahassee. Hali, good evening. Reporter hi there, lester. This is Donald Trumps fourth rally in this state in less than 48 hours, as he turns into the final stretch, slowing down time in campaigns to focus on mobilization and messaging. Trump hitting obamacare in an attempt to sharpen that message, but today still stepping on it. Today Donald Trumps acknowledging political reality. I believe florida is a mustwin. Reporter so to win florida like he says he has to, hes going after Hillary Clinton hard on the Affordable Care act. Pouncing on news that premiums will rise double digits on some consumers. All of my employees are having a tremus reporter but even trying to stay on message, he went offcourse during a photo op at his trump branded property. Reporter with just two weeks until election day, its another misstep and missed opportunity for a candidate with his own alternate political reality. Were going to win florida. Reporter but the most recent polling shows, thats not a sure thing. While trumps now hitting clinton on her syria policy, arguing it will lead to world not what he said eight years ago. I think shes a wonderful woman. I think shes a little misunderstood. Reporter trumps world view different now than it used to be, with new audio release. I dont like to analyze myself because i might not like what i see. I dont like to analyze myself. Reporter the tape recorded by a trump biographer in 2014, who now opposes his candidacy, paints a picture of a man for anathema. Reporter for him, failure is not an option. So how does he avoid it in two weeks . First, keep hitting the Affordable Care act. Second, trump will have to prove he can defend himself from increasingly tough attacks like this one. A democratic super pac in ohio out with this new ad, arguing trumps too dangerous. The electoral map reporter his path to the white house, not nonexistent, just narrow, with battleground florida make or break. Hallie jackson, nbc news, tallahassee. Reporter im Andrea Mitchell in florida, where Hillary Clinton is spending two precious days on Donald Trumps turf out of the final 14 days. Hello it is so great to be back in florida. Reporter because without florida, her campaign says, trump has no path to the white house. Clinton going after him today for saying concede if he loses. Americans are coming together. At the very moment when donald trump is making an unprecedented attack on our democracy. Reporter clintons biggest challenge. Complacency. Aides fearing her narrow lead in most florida polls, just a few points ahead, could mean people stay home. This is bigger than me, its bigger than any of us. Its even bigger than donald trump. Reporter so in early voting is starting. Dont forget to vote. Reporter so far, nearly twice as many have voted early in florida than four years ago. Why did you vote early . Because its my first time, so i wanted to get it out of the way. I made up my mind a long time ago, the decision was made. It was, why wait . Now i feel relieved and relaxed for the first time in months. Voters are seeing the difference between these two candidates and theyre settling in the clinton nagging problems for clinton tonight. Another stolen email from Clintons Campaign chairman, released by wikileaks about when president obama first learned about her private emails. When the story first broke, he said he had just learned about it. The same time everybody else learned it through news reports. Reporter but in the email released tonight, sheryl mills writes, we need to clean this up. He has email from her state. Gov. Clinton telling a miami radio show tonight the costs have gone up too much. So were going to really tackle that. Reporter and clinton did get an endorsement from a republican, general colin powell who served under reagan and both bushes. He had in a hacked eemp mail called donald trump a national disgrace, tonight saying that Hillary Clinton is fully qualified to serve as president. Lester . Andrea mitchell in florida tonight, thank you. We have a closer criticism over obamacare, the Insurance Program meant for people who do not get insurance through their employers. The new announcement of a 25 increase in premiums with fewer choices has many wondering what it will mean for them. We get details from nbcs tom costello. Reporter occupational therapist sarah half acre says middle. She needs the obamacare coverage offered, but her insurer is losing money in the state and pulling out. Now she has to choose a new plan and her premiums are sure to rise above her 340 monthly payment. Its called the Affordable Care act, however, its not affordable for individuals such as myself. Either premiums are going to have to come down, or im not going to have health insurance. Reporter its happening nationwide. Come january, 1 in 5 customers will find one insurer offering coverage. And premiums are rising fast. On average, up 25 . Down 3 in indiana, but up 116 in arizona. Pushing premiums up 50 to 300 per month in some cases. The reasons . 11. 4 million americans will be on obamacare in january, most are sicker than expected. Younger healthier adults are choosing to opt out of coverage and pay the tax penalty instead, despite president is that the insurance pool is smaller and it gets a higher percentage of older and sicker people who are signing up. Reporter the white house says nearly all obamacare customers will receive tax credits to offset the higher premiums, and most could even find plans for less than a hundred dollars per month. In fact, most of the people who have enrolled are low income people who are benefitting from significant subsidies. Insurance premiums also projected to rise 3 to 7 . Tom costello, nbc news, washington. Now to a mystery illness that struck a cabin crew in the air. Dozens falling ill on a transatlantic flight that left San Francisco. The pilot forced to divert and get the plane on the ground, crew members rushed to hospitals. Now the question tonight, what caused the emergency . Lets get the latest from nbcs morgan radford. Clear to land. Reporter a medical the tarmac after a mystery illness forced this plane to make an emergency landing. 22 cabin crew members and three pilots becoming sick midair. British Airways Flight 286 left San Francisco at 7 15 monday night with 400 passengers on board, headed for london. When suddenly the pilot diverted the airbus a380 to vancouver. Crew members buffed to the hospital or checked out and while passengers were largely kept in the dark. What irritated us, part one, is, if youve got a ship, you make sure your people get off, your passengers. Not the crew first. British airways apologized to passengers, Offering Hotels and alternative flights while telling nbc news, they are investigating the incident. The illness, still a mystery. Morgan radford, nbc news, los angeles. Police are on the hunt this evening for a woman caught on camera committing a shocking crime. Shows her opening fire on three cousins right on a miami street. Incredibly all three survived. Now theyre telling their harrowing story to nbcs gabe gutierrez. Gunshot, multiple patients. Reporter the gun shots rang out near a miami park. Surveillance video showing three people scrambling for cover after a brazen robbery. 20yearold Heidi Martinez shot in the leg. She says she was and 12yearold cousins when a woman rushes up behind them, demanding martinez hand over her purse and phone. She does, but the woman fires one shot anyway. Her cousins then toss their phones and she fires at least seven more shots. All happening in less than a minute. Bystanders were in the chaotic aftermath. The three cousins, all immigrants, were rushed to the hospital. Tonight the condition after being shot in the stomach. No arrests so far, but investigators hope this video will bring new leads. We dont believe they were targeted. Reporter as she watched it for the first time, martinez told us she believes the shooter, who hopped in a getaway car, could be part of a gang, but she says she has no idea why what started as a robbery turned so violent so quickly. Gabe gutierrez, nbc news, miami. Now lets turn to the growing outrage over thousands of california, ordered to repay bonuses from the iraq and afghanistan wars. Congress is launching an investigation amid bipartisan outcry. The government is also examining when this happened in other states. And for the first time, were hearing from both the white house and the secretary of defense speaking out on the controversy. Nbcs Anne Thompson has more. Reporter the demand California National guard members pay back enlistment online. Its a disgrace the way we treat our heroes. Iraq and afghanistan veterans of america starting a petition, calling on the Defense Department to forgive this error, Building Support with the hash tag, pay them back. If our government can bail out banks and so many other folks that have done wrong, it seems mindboggling that they cant bail out some Service Members who put their life on the line in defense of this country. They needed my skills. Reporter robert, one of 10,000 soldiers enticed by the iraq. We did our duty, and now theyre slapping us in the face for it. Reporter the California National guard improperly paid bonuses as it tried to boost its ranks during the height of the wars in iraq and afghanistan. That led to a Fraud Investigation resulting in seven convictions. Today, president obama requested an expedited appeals process for soldiers. The white house says while not supporting blanket forgiveness, the soldiers will not fraud. In paris, the secretary of defense promised action. We are going to look into it and resolve it. Reporter even in this caustic campaign season, democrats and Republicans United in calls to stop collection efforts. Now robert is fighting again, appealing to keep his 20,000 bonus. I upheld my end of the bargain. Reporter having already paid with his service. Anne thompson, nbc news, new york. Turning now to that largescale u. S. Backed offensive, iraq. On the march to mosul, iraqi troops freed what was the largest christian city in that country from isis control. Joining that victory, christian militia men who fled the city two years ago. Our Richard Engel inside iraq shows us the destruction they found when they returned. Reporter this wasteland is whats left of the town of cara kosh. Once home to 50,000 iraqi christians. Father amar escaped, else, two and a half years ago, when isis started closing in. Now hes back for a brief and dangerous visit. We want to see the city, and we want to be sure that the people can return back. Reporter the offensive against isis has made that possible, but father amin first wants to see his church. Or whats left of it. What was there was here. Reporter this church was the largest in all of iraq where christians have lived for as long as there have been christians. Iraqi fighters used the pews for fuel to spread the flames. And the courtyard for target practice. I want to hurt them, but to pray of course. Reporter for now, the only christians staying in town are unit, volunteers who have taken up arms, like jamil, a poet. This is one of the proudest moments of my life, he said. Proud, because jamil and his men were among the first to arrive, driving in sunday, initially celebrating. Then battling isis snipers. Christians have survived previous socalled caliphates. Now theyre coming back to rebuild their churches and defend them. Because nobody else Richard Engel, nbc news, cara kosh, iraq. Still ahead, a new consumer warning, how those credit card chips may actually be leading to more fraud online. Ordinary tissues left dakotas nose sore and red. So dad slayed the problem with puffs plus lotion, instead. 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By now, most americans are using the credit specialized chips, making them more secure, when you use them in facetoface transactions. But the increased security is giving way to a rise in online fraud. As nbcs Miguel Almaguer shows us. Reporter like millions of americans, cassie sefier does her shopping online. Once a victim of credit card fraud, sefier thought she was protected when her replacement card came with a security chip. A few months later, she fell victim again. If theyre going to that technology is going to protect me and keep my information safe, i would expect better. Reporter experts say its part of a troubling and costly new trend. These specialized chips do make your card tougher for thieves to use inside brick and mortar stores. So crooks are turning to the internet where security chips dont protect you. Theyre a physical element. And online is a virtual environment. So it only works when you have a terminal to use the chip in. Socalled card not present fraud will rise to 4 billion this year. The cost is often funneled down to consumers. I feel kind of helpless, but theres not a whole lot i can do. Reporter there are ways to protect yourself when shopping online now. Dont save your credit card numbers on store websites. Sign out and log off wifi. Use Password Protected wifi like at home. For cassie and millions of americans, new rules to shop by. Miguel almaguer, nbc news, los angeles. Up next here tonight, instead of going to get a flu shot, how about a i love my shop, but my back pain was making it hard to sleep and open up on time. Then i found aleve pm. The only one to combine a sleep aid plus the 12 hour pain relieving strength of aleve. Now im back. Alright, did you know i was the mommy slam dunk champion . Lets see it oh youre ready. Alright. Mama go up, up, up no matter how you get into the health care system. Unitedhealthcare can help you compare doctor quality ratings and costs. 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Heres ron mott. Reporter call it the cleveland trifecta. An nba championship, the Republican National convention, and now the world series. Yeah reporter what a few months its been. How do you top all this . I think the world is seeing cleveland in a different light. I think clevelanders have come to appreciate cleveland in a different light. Reporter the indians and visiting shall we say, perennial c students, are chasing history, and it just may be what the doctor ordered for a nation going battie over divided politics. At 104, nana has always appreciated her city and her beloved indians. Which team is better, the 48 team or this year . This year. Reporter the country might find picking sides tough, but potential tv ratings gold. Doesnt youre rooting for, whether its cleveland, chicago, or neither team, its just fun. Reporter fans from each have sob stories of previous disappointments, though someones guaranteed to go home happy this year. Im ready. Ive been ready. Were here to make sure we keep the curse alive. Reporter for nana, two years older than wrigley field, her tshirt spells out whats on the line. I want them to win one before i die. Ron mott, nbc news, cleveland. And thats going to do it for us on a tuesday night. Im lester holt. For all of us at nbc news, thank you for watching and goodnight. Wkyc. Com. Tonight we celebrate the newest city of champions, cleveland. Cleveland is a city of champions again. The cavaliers broke the summer and they keep it going with a full head of steam deep into the fall. The indians have won the American League pennant. Tonight like never before, it is clevelands time to shine. Soak it in, its about time. Hello on a historic night in downtown cleveland, there it is, when we said yes to build the gateway complex, this is what we were thinking of. World series game number 1