World headquarters in new york this is nbc nightly news. Reporting tonight, lester holt. Good evening. They are off and running. Late today on the heels of Hillary Clintons official entry into the president ial race yet another long anticipated name joined the field of contenders. Florida senator marco rubio addressing supporters just a short time ago in miami formally declaring his bid for the republican nomination. Meantime just over 24 hours under her twitter launch candidacy, Hillary Clinton has barely been seen apparently by design. Only sightings of her posted online as she makes her way to iowa by car. Yes, its her on a Security Camera video at a fast food restaurant. This started out at least as a very low key campaign kickoff. Were covering both Campaign Launches tonight. Andrea mitchell starts us off in des moines iowa. Andrea good evening. Reporter good evening, lester. Its certainly an unconventional launch. Her campaign for the presidency. One of the best known women in america on her road trip to iowa stopping at coffee shops is like this one and trying to blend in along the way. For her first day on the road this was the only evidence Hillary Clinton was campaigning. Her tweeted picture from a gas station stop near altoona, pennsylvania. And pictures from chris lern a College Student who bumped into her. Literally when i walked out the door i saw her and i was like oh thats her. I didnt even realize shed be here. It was funny, though. Reporter this afternoon Security Camera video of her ordering a chicken bowl with guam moly at a chipotle outside toledo. Tantalizing hints of a seemingly carefree jaunt from the clinton estate in chap pa quau across key battleground states. More than a thousand miles to her public event in iowa tomorrow. Carefully choreographed to reintroduce her as the selfdechaired champion of Everyday Americans like those seen in her campaign video. Weve been doing a lot of home renovations. But most importantly we just really want to teach our dog to quit eating the trash. Reporter trying to recreate the voting blocs of the winning combination from to 08 women, latinos, millennials. Like this couple who said they had no idea the interview they did two months ago would be part of her campaign announcement. We were pretty shocked. I rushed home and by the time i got home my phone had already exploded. Reporter and a group with growing clout gays. We invited her to come to our wedding. Reporter it did not mention her most recent job, secretary of state and questions shes sure to face about Foreign Policy failures like benghazi or more recently her deleted emails. Instead shes borrowing language from critics on the left like senator elizabeth warren. Let it stand in favor of those. So im hitting the road to earn your vote. Reporter some Iowa Democrats still need to be convinced. I havent made my mind up yet. I want to see all the candidates and hear whato y before i make up my mind, but im really excited about her joining the race. I would like to see a woman in the white house. I am concerned about the clinton, bush clinton, bush that theres just been so much talk of clinton, bush. Reporter and so she gets here tomorrow shell meet people in small groups trying to reconnect with the very voters who rejected her soundly, she came in third when she ran for the presidency last time around in iowa. By contrast republican senator o rubio is making a very Public Entrance into the race. Kelly odonnell is in miami where rubio just made it official in front of a pumpedup hometown crowd. Hi kelly. Reporter hi lester. Candidates rarely make their announcements in the evening, but marco rubio did. He came here at the precise time of 6 03 p. M. To make sure that Cable Networks like fox news would carry it live for a friendly audience and the location was also intentionally symbolic. The landmark miamis freedom tower. The ellis island for cuban refugees who fled Fidel Castros regime a generation ago. The legacy. A crowd of supporters who registered for tickets came to see a bluecollar son of cuban immigrants. You know i think we need somebody who is real. I think thats so important. Reporter tonig ser marco rubio launched his run for the republican nomination appropriately in the place where his parents entered the country. I live in an exceptional country where the son of a bartender and a maid can have the same dreams and the same future as those who come from power and privilege. Reporter earlier y he stopped by to reverse, all smiles but taking no questions. Saving his thunder for later. Senator, youre the youngest candidate. Are you prepared to be president , sir . At a local lunch spot florida voters told me they can relate to rubio. He is a younger candidate compared to some. What does that mean to you . I think like i do. And have same views as i do. Reporter like the extra sugar heaped in cuban coffee here rubios heritage sweetens his appeal. What do you think rubios biggee strength is . His backgro the United States is changing. Reporter rubios quick political rise does include some awkward moments. Pressure appeared to get the better of him with that water break, delivering the gop state of the Union Response in 2013. And now more personally. Rubio is challenging his own mentor fellow Floridian Jeb bush who also is expected to run for president. And rubio is the third firstterm senator to get into the race but unlike ted cruz and rand paul hes more establishment than tea party and unlike rand paul, his aides tell me that rubio will not stich reelection to the senate while hes running for president. Im joined by chuck todd moderator of meet the press. Lets talk about the timing of the rubio announcement in the wake of the clinton announcement. T help him draw a contest . Well, look it does. He would like to have the week to himself. Lets not pretend he wants to have this split screen moment with Hillary Clinton. However theres a way for him to make lemonade. He did it well in this speech. Hes jen aration x, shes a baby boomer. By the way, marco rubios chief primary opponent is jeb bush another baby boomer. Hes able to make that point quite a bit, that hes about the future. You talk to anybody, president ial campaigns are always about the future. Is something the Clinton Campaign is very worried about. Theyre hoping her gender the idea of electing the first woman president will do that. And lester one other note and this is why generation matters. Five of the last six president ial elections have been won by the younger candidate. Voters instinctively respond to the future sometimes by going with the younger candidate. Were going to see others jump very quickly, jeb bush among them . I think were going to see a little bit of a lull here over the next couple of weeks, then watch out for may. Thats when youre going to see officially Hillary Clinton with her big speech and then everybody else like planes on a runway Ben Carson Jeb bush you name it. May will be abig announcement month. Chuck todd thank you. Senator rubio, we should note will appear live tomorrow morning on today. We want to turn to the shocking video adding more fuel to the firestorm over abuse of police force. It late today charges will be brought in this case though the Sheriffs Office says it was an accident. Nbcs Kevin Tibbles has more. I got you. I got you. Reporter police video of a sting operation in oklahoma. The suspect bolts from under cover agents with the tulsa county Sheriffs Office and is chased. A scuffle is picked up by a police body cam. According to police one deputy says taser. Roll on your stomach. Now. Reporter but then 44yearold eric harris who Authorities Say had an extensive criminal record is not tased but shot. Immediately a voice is heard. I shot him. Im sorry. Reporter officers then subdue harris. One neils on skneels on his head. Im losing my breath. Reporter the man who pulled the trigger is 73yearold bob bates, an Insurance Broker who volunteers as a reserve deputy. The Sheriffs Office says he mistakenly pulled his handgun instead of his tadzser and fired. Harris died later. He believed he had a less lethal device in his hand and he was going to administer a less lethal taser probe when in reality he had a firearm in his hand. Reporter the Sheriffs Office says reserve deputies are members of the public doctors, bankers, even retired Police Officers who receive varying degrees of training. Bates donated thousands of dollars in equipment and the Authorities Say his role in this operation was in a backup capacity. If he had as much training as he supposedly had, he would definitely know a. 357 from a taser. Reporter while a Sheriffs Office investigation recommended bates not be charged, late today the tulsa County District attorney did charge him with Second Degree manslaughter. Kevin tibbles, nbc news chicago. The images from that tulsa shooting emer less than a week after the country saw video of an officer in South Carolina fatally shooting an unarmed man running away from him. Tonight more dash cam video is filling in gaps about what that officer did in the aftermath. Nbcs Gabe Gutierrez has that for us. Reporter just minutes after officer Michael Slager shot and killed walter scott, we hear his voice speaking to another officer. When you get home probably be a good idea to kind of jot down your thoughts or what happened. Okay. You know once your adrenaline quits pumping. Its pumping. Oh, yeah, oh, yeah. Reporter schenn slager is heard speaking with someo else on the phone. Hey, everythings okay. Okay . I just shot somebody. Reporter now, there are calls to charge other officers on the scene who claimed in written accounts they rendered first aid including cpr. Thank god for video because what we see is that there was a very differ encounter that actually happened on that day. I havent seen all of the videos yet, but i know that the one officer did try to prevent the bleeding. Reporter also today a second man came forward to claim slager used excessive force. Julius wilson seen here in this cam video said that slager tasered him even though other officers pinned him down. How painful was it . Excruciating. Reporter Mario Gibbons claimed he was threatening to seuss because of slagers taser use the year before. Slager has not yet entered a plea. His new attorney is declining to comment. The state investigation into the Walter Scott Shooting is expected to last at least until next week. Some here praise city officials for charging the officer within days but right behind me others just finished protesting calling for changes at the police department. Lester . Gabe gutierrez, thank you. Four americans received lengthy prison sentences today for an infamous incident during the iraq war. All four are former blackwater security contractors convicted for the killings of 14 unarmed iraqis including women and children in baghdad in 2007. Nicholas slatten was sentenced to life in prison the only one convicted of murder. The other three each got 30 years in prison. Spring means storms and a dangerous one swept through North Central texas this morning creating flash floods in ft. Worth that moved in so fast some people were forced to abandon their cars. The water reached waist high in some areas, and its not over. More rain is expected in the region throughout the week. Still ahead here tonight, late flights and lost bags. New rankings are out. 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Week by week the airline that flights e most md80s, american is retiring them to make way for more modern planes. But where do they go on their final flights . Tom costello went along for the ride. Reporter its the sunday night run, baltimore to dallas. Thank you. Reporter but what none of these travelers knew before booking their tickets is that this is the last time this plane will ever carry passengers. This is this aircrafts final flight. They are retiring it. Reporter after 23 years tail number n595 is at the end of its life. As American Airlines slowly retires what had been the backbone of its fleet. All 370 of its md80s built by Mcdonnell Douglas before the fully automated cockpits of today. The kind of plane old School Pilots like to fly. Like an old shoe. Theyre very comfortable in it. Its such a reliable good solid arm f airplane. Repor departed 595 was off again, headed for its final resting place. On its log books 71,000 hours of flight time. More than 3,000 takeoffs and landings. More than 4 Million People have flown in these seats. It wasnt long before we were on the ground in roswell, new mexico the dry boneyard for hundreds of planes that have served their time. Every make model and brand. Many of them cannibalized to keep planes that are still flying in the air. This is where planes go to die, dismantled piece by piece. This once proud 747 now a relic. Its really an inglorious end of these icons of the jet age, now salvaged for spare parts and scrap metal. But more modern more fuelefficient planes mean this pilots favorite is nearly obsolete. So every week for the next two years yet another md80 will touch down for the last time. Tom costello nbc news roswell, new mexico. We have late word tonight of an emergency involving an Alaska Airlines flight from seattle bound for los angeles. The airline says that shortly after takeoff the pilot reported hearing banging. 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Reporter the meitiv family is battling Child Protective Services again. Their two children were taken into custody sunday afternoon after a report that they were walking alone blocks from their home in Silver Spring maryland. 10yearold rafi says they were kept from their parents for hours. I thought i was going to be taken away from my parents. They wouldnt even let my 6yearold go to the bathroom. What did they think she was going to do . Reporter last December Daniel and alexander were accused of neglect for what they call their freerange parents style which they say teacindependence. Theyre healthy, theyre well behaved, glowing, well fed, well dressed, articulate confident, theres nothing in that list that suggests neglect. Thats our new safety plan. Reporter to get their kids back the meitivs signed a safety plan which prohibits them from letting their children go outside by themselves. 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Watching a 21yearold win is special. Tiger woods in 1997 was younger but only just. At 21 youre not supposed to be this poised this gracious this good. Just how are you feeling right now . Yeah i dont really know. Its incredible. Its one of the best feelings. Reporter spiet up in texas with golf clubs in his hands and a philosophy from his father set goals and achieve them early. When he walked off 18 family and friends were there to share the moment. A beaming grandfather in the stands hugs from his parents and a kiss from his girlfriend a High School Sweetheart. His younger sister ellie who was born with a neurological disorder couldnt be there. After each round she said jordan did you win . Did you win . I can tell her i won now. Reporter being her older brother, the golfer writes on his website, humbled me every day. Im a professional golfer but what i do on the course i want to be secondary to what i do off the course. Reporter that humility has won over the competition. Hes just a quality individual. I think its hard not to like hard not to pull for the guy. Reporter fair to say the gentlemans game not only has another champion it has another gentleman. Stephanie gosk nbc news new york. And that will do it for us on this monday night. Im lester holt. For all of us at nbc news thank you for watching, second kiss with drake. Stop the tape. Was he really shocked or was it planned . Now on extra. Surprise smooch or or carefully choreographed kiss the real story behind drake and madonnas headline making makeout, renee is front row at coachella with new close bradley copy is back on with his ex. Kim and Khloe Kardashian take the holly land. Bobby flas divorce boils over his ex today facing the cameras and they battle o money. Ryan reynolds slammed by a hit and run driver. How hes doing today as his wife blake tells us about baeb james. Youre looking like youre getting some sleep. Really good makeup artist. J. Lo showing the 20 somethings how its done at the mtv movie awards. Can you do a spin for me . A spin . Plus golf sent vegas Jordan Spieth and the two women propelling his dream. His High School Sweetheart and the city who inspired him to greatness