From nbc news World Headquarters in new york, this is nbc nightly news, reporting tonight, Kristen Welker. We begin with a potential danger in the sky averted this weekend. Two United Airline pie the lots arrested saturday morning on suspicion of being under the influence of alcohol. They were scheduled to fly 141 passengers from scotland to new jersey. Its not the first time this year pilots have been custody for alleged intoxication. In this case, aviation experts say the system worked, but some passengers on that flight were left shaken and frustrated. Morgan rath ford has our report tonight. Reporter Authorities Say the two pilots are 35 and 45. Their identities still not confirmed. They were supposed to be flying united flight 162 scheduled to leave scotland at 9 00 a. M. Yesterday with 150 people on tweeting, what is going on . Police in the tunnel. Very little information. It turns out the pilots were arrested suspected of being drunk. If you are uncomfortable with a member of your crew, you dont fly with them. The safeguards in place did, in fact, work. The entire crew was replaced and the flight was delayed ten hours. Finally landing all the 8 45 last night. Today other passengers there pie the los on a plane drunk absolutely concerns me. The two pilots have been removed from service and their flying duties. We are cooperating with the authorities and will conduct our own investigation as well. This isnt the first time this happened. A flight to philadelphia cancelled and a local pilot charged. In march American Airlines pilot failed two breathalyzer tests before takeoff and was arrested. He pled no contest and Dennis Murphy flew 151 passengers from orlando to new york while allegedly under the influence. Just yesterday a reminder of the great responsibility pilots have after an engine problem forced a southwest flight to make an Emergency Landing in florida. Passengers praised the pilot. Were grateful we were watched over and we had good pilots. As for the two pilots arrested this being held at a Police Station in scotland. A long flight for those passengers finally arriving here in newark. Those pilots are expected to appear in Court Tomorrow morning. Kristen . Morgan, thank you for that report. In louisiana now tragedy for a group of workers headed to flood ravaged baton rouge. Two people were killed and more than 40 jurd when their charter bus crashed into several vehicles. Police say the bus driver does not have a hes an undocumented immigrant. And now to politics and questions over Donald TrumpsSignature Campaign issue deporting undocumented immigrants. Also tonight were getting a look at the stark differences in how trump and Hillary Clinton are prepare ing for their very first debate. We have two reports tonight beginning with jacob rascon in iowa. Whats the latest there . Reporter the trump neshs. Some worried trump seems undecided on a key component of his immigration policy just 71 days before the election. Donald trump off the trail, but his campaign busy today contending he hasnt budged on his signature issue. What he said is signature. Hes been consistent. His position and principles have been absolutely consistent. Last undocumented inl grant must be deported. They have to go. What if they have no place to go . We will work with them. Trump singling out criminals, a fraction of the 11 million undocumented immigrants. On day one, im going to begin swiftly removing criminal ul legal immigrants from this country. But what would a President Trump do about the rest . The Deportation Force he hasnt mentioned that since last november. The softening is more approach than policy. The softening troubling to trump supporters. The right tone for others. I think there will be a happy medium. The campaign challenged on minority outreach including his i told you so response to the shooting of dwyane wades cousin. Donald trump has a plain spoken way about him. His Campaign Manager asked how many times has trump spoken audiences. Would you be surprised if the answer is never . I would not be surprised. Stuck on defense, the Trump Campaign ready to shift the focus back on Hillary Clinton. Jacob rascon, nbc news, des moines, iowa. This is Kelly Odonnell in washington. Four weeks, two very different playbooks. Our leaders have stupid. Our politicians are stupid. Heading into the ultimate debate stage e to call him out. I called him out when he was calling mexicans racists. Today donald trump did debate prep his way. Hes an unconventional candidate. Hes not going to prepare the way hillary does which is cram her head with these binders. No formal rehearsal, just hashing out ideas. Including former executive roger ails trump has resisted traditional mock debate practice and plans to rely more on his gut. Meanwhile, today Hillary Clinton is on the fundraising circuit with four events in the hamptons. This weekend celebrity supporters, Ashton Kutcher and jason george helped out Clintons Campaign while barre baa streisand hit send to raise cash. Clinton has been carefully preparing her responses to meet debate time her advisers call trump a formidable adversary. Its going to be difficult. Youre going to have to prepare for many different trumps. Wellbehaved, modest trump. I doubt well see that. Kind of off the rail trump. Holding fewer Public Events right now as ve raises money, clinton will call on her most famous surrogates, president obama and Joe Biden Campaign without her in the next couple weeks. There are going to those debates. Kelly, thank you. We want to turn now to the tropics where there are several systems threatening parts of the gulf and east coast. Meteorologist raphaelmy ran did is tracking it for us. Were tracking three storms in the atlantic. One a major hurricane. Thats gast tone moving out to see. But depressions 8 and 9 will affect the southeast. This is the one we have been tracking day after day. It fly winds at 35 miles per hour. Moving over the warm waters of the gulf of mexico likely to strengthen to a tropical storm. This will make landfall some time towards the middle of the week exactly where remains yet to be seen. Very heavy rain in florida over 6 inches possible in southern florida. Our next tropical depression is headed toward the carolinas. Thankfully also looks to curve out to sea. Still needs to be watched closely in track all of that. Overseas to the ongoing devastation in syria. More than a dozen civilians were killed when bombs fell on a funeral procession this weekend. Efforts to deliver muchneeded food anden medicine are now on hold. Heres matt bradley. Reporter in the besieged city of aleppo, even the dead face the horror of war. Barrel bombs struck mourners paying their respects to victims of they were greeted with another round of bombing. Its called a double attack. Twin attacks for maximum casualties. Civilians continue to bare the brunt of this war. Observers have died in aleppo alone. The u. N. Says russia agreed to a ceasefire to let food and medicine into the city. The fighters themselves havent agreed. Theres been some progress, a deal between rebels and syrias government ended a siege last week. Thousands of civilians and fighters were able to leave. But at what cost. Here departing evacuees are heckled by government troops. Syrians worry a ceasefire means surrender and loved ones vein. Matt bradley, nbc news. Devastating indeed. Back here in this country, its the question that will be asked at your next appointment. The state made it illegal for counterparts at the massachusetts. We graduated from the same school. But not making the same pay. After a long battle with her employer and testimony before congress on pay inequality, the single mother was awarded the same salary as her male colleague. Nbc news reached out to the school that said its unable to comment on personnel matters. This month in an effort to close the of massachusetts signed a pay equity bill into law prohibiting companies from asking perspective employees their current or past salary history. Its going to be a model used in the rest of the country. Reporter victoria directs the women in policy program at harvard and says the pay gap can last a lifetime. This matters so much because often if people get a lower salary than their skills would have their career. You get a snowball effect. When boston attorney was job hunting, she was questioned repeatedly about her previous salary. They are asking for your salary history. So it almost felt like in some ways i had to justify why i was asking for a certain percentage or increase from what i was making. She says this it may have cost her thousands. Was there ever a point you felt like maybe you were asking for too much . Definitely. Felt like, well, maybe i can take a pay cut. For both satisfaction in knowing the Playing Field is more level. Its exciting to me that folks will have the tools that they need so they dont have to go through this. So its promising. Nasa may be getting closer to a Human Mission to mars. A team of scientists world for an entire year. They simulated what life would be like on the red planet. Reporter after a year of total isolation, today they are returning to civilization. Im super excited because its the first time we get to be outside. Reporter six scientists walked into this 36foot wide solar powered dome last august. L an astronaut for a year. On the rugged slope, its the longest ever nasa mission to understand how a yearlong space trip would affect astronauts. Thats the view from simulated mars. And friends are on a 20minute delay replicating the 35 million mile distance from mars to earth. Going outside required a full space suit. They conducted experiments on plant growth and water, but the big question today are they still friends . We could definitely use some other time to talk to other people. Plus fresh fruit and a beer, saying goodbye to their home sweet dome. Incredible. Still ahead, stopping the zika virus with mosquitos. I worked years to get my medicare dont know where id be without it so when i heard about conartists committing medicare fraud. It made me so mad i wanted to give them the old onetwo to get a free offer or gift two, always check your medicare statements for errors these crooks think were clueless, they dont have a clue its your medicare, protect it . . toilet flush if you need an opioid to manage your chronic pain, you may be sooo constipated it feels like everyone can go. Except you. Tried many things . O find relief . You may have opioidinduced constipation, oic. Its different and may need a different approach. Opioids block pain signals, but can also block activity in the bowel. Which is why it can feel like your opioid pain med is slowing your insides to a crawl. Longing for a change . Have the conversation with your doctor about oic, those living with chronic pain and struggling with oic. Were back with a push to get control of the sooe ka outbreak by the same way its being spread. Were talking about mosquitos. Its an invo native idea approved by the fda, but is it safe . Heres nbcs gabe gutierrez. In the sleepy florida keys, theres brewing. A fight over government, science and now sooe ka. I would absolutely feel like a gi any pig. The local Mosquito Control district is looking into a plan to be the first testing ground for e genetically modified mosquitos to stop the spread of diseases. The insects would be released in key haven. They called it ju ras sick science. Whats being objected to is the safety for the mosquito eggs would be injected with a specific gene. When they mate with e females, their offspring die more quickly reducing the mosquito population. A scientist with a British Company behind the project. We have done trials in brazil where in every single case we have shown over 90 of the control of the mosquito population within six to nine months. Reporter the debate has intensified amidmoupting fears of federal Health Officials issued travel warnings for pregnant women and parts of miamidade county. But with no cases of home grown zika in the keys, the risks outweigh the benefits. These cannot be recalled. Once they are out there, they are out there. Theres not enough information. They are mounting a campaign. Gabe gutierrez, nbc news, miami. Coming up, we go to a critical swing voters there, which voters there, which i thought my bladder leakage meant my social life was over. It scared me and caused a lot of disappointment and how i feel about myself. Wearing depend underwear has helped me feel more connected to the people around me. I know that im protected, im not thinking about bladder leakage and im meeting people. I feel really grateful just to be absolutely free. Unlike the bargain brand, new depend fitflex underwear is now more flexible to move with you. Reconnect with the life youve been missing. wolves howling when heartburn comes creeping up on you. Fight back with relief so smooth and fast. Tums smoothies starts dissolving the instant it touches your tongue. And neutralizes stomach acid at the source. Tumtumtumtumtums you both have a perfect driving record. Perfect. No tickets, no accidents. That is until one of you clips a food truck ruining your perfect record. Yeah. Now you would think your Insurance Company would cut you some slack, right . No, your insurance rates go through the roof. Your perfect record doesnt get you anything. Anything. Perfect. For drivers with accident forgiveness, Liberty Mutual wont raise your rates due to your first accident. Ce. Wac a become to politics, the state of wa white house and the number one concern for voters there is jobs. Its an issue thats taken on fresh urgency days after hundreds of positions were cut at one large company. Jacob soboroff talked to voters there. These two buildings are part of the original part of john deere manufacturing. They are over here in the new facilities here. Were down to maybe 3,000 employees. Robbie was a factory worker at john deere until he became Assembly Line let go. 100 people losing their jobs. The company says that workers like robbie get laid off due to the ups and downs of the market. Since then they have shed more than 1,000 jobs. Hansons dairy farm is just outside waterloo. Blair hanson is the sixth generation to tend to these fields. Tractor . I heard they have been laying people off. Corn prices are low. Farmers cant afford to buy new tractors. The plants slow down and they have to lay people off. When it comes to the candidate between clinton and trump, you have a feeling one way or the other who can bring jobs like the ones lost back . I would say trump has the better chance. Hes a businessman. Hes going to look out where Bernie Sanders and ted cruz won the iowa caucus, who can bring the deer jobs back . Maybe ill go around on the next round of president s. Im going to say a he. Got to be he. He. She. I dont want either one of them. Id have to go green. She. Hillary clinton . Yes. Ross perot. Iowan, the they have two months left to debate candidate is best for their neighbors. Jacob soboroff, waterloo, iowa. Thats the way to talk about politics. We have a sad note to report from the music world tonight. The mexican singer and composer juan gabriel died unexpectedly. He performed this weekend to a sold out crowd in california. Million albums. He was 66 years old. Still ahead, how one little girl is bridging division and spreading when it comes to healthcare, seconds can mean the difference between life and death. For partners in health, time is life. We have 18,000 people around the world. The microsoft cloud helps our entire staff stay connected and Work Together in real time to help those that need it. Changes how we work. What we do together changes how we live. Hey, need fast try cool mint zantac. It releases a cooling sensation in your mouth and throat. Zantac works in as little as 30 minutes. Nexium can take 24 hours. Try cool mint zantac. Dont let dust and allergens get between you and lifes beautiful moments. Flonase gives you more complete allergy relief. Only control one inflammatory substance. Flonase controls 6. And six is greater than one. Flonase changes everything. . Someones hacked all our technology. Technology. Say, have you seen all the Amazing Technology in geicos mobile app . Mobile app . Look. Electronic id cards, emergency roadside service, yep, geicos mobile app works like a charm. Geico. Expect great savings and a whole lot more. Finally tonight in a heated rhetoric, a young girl is doing Something Special to spread a little kindness. Her Humble Movement has gone global. Heres steve patterson. If youre trying to keep up with her, good luck. Heres some bracelets. Because when shes on her mission, few can. Whenever youre kind to someone, you give them the bracelet along with the note. 10 yoerld leah simple. I want to live in a world where everyone is nice to each other and everyone can be the best person that they can be. In these stressful times, its striking a nerve. Earlier this summer when grown up on the news were showing how ugly they could be to each other, leah came up with something beautiful. Get people to pay it forward with kindness. I said, dad, im going to hand out some bracelets and people will have to be kind. Leah. Its one of those things, okay, ill see how far she takes this. Using an old birthday gift, a bracelet making kid hit, she started making them by the dozens and hit the streets asking people to take one, do something good and then give them the bracelet and ask them to do the same. Thank you so much for everything you do. It all started at Community Events just like this. Leah trying to make a difference in her own facebook later and her message of kindness is touching people all over the world. 102 new messages. Requests for the bracelets are pouring in, but handing them out in person is still her favorite part. Dont eat it. Thank you very much. Leah says shes just being herself. My dad tells me to be me and thats what i try to do. I think thats what im good at. Wisdom from a 10yearold we might all use. It doesnt cost anything. Steve patterson. Nbc news, west sacra california. What an inspiration she is. That is nbc nightly news for this sundays. Im Kristen Welker reporting from it new york. For all of us here at nbc news, thank you for watching and have coming up in an hour, sunday night football, preseason, Cincinnati Bengals facing the jacksonville jaguars. Hi, mike tirico, some think. First it is the timeline that takes you inside the record breaking 2013 season of peyton