Reporting tonight, lester holt. Good evening. What a crushing way to of responsibility to decide whether someone lives or dies. Tonight a boston jury who saw every gruesome picture, heard every heartbreaking story of loss and suffering, has spoken on the fate of marathon bomber Dzhokhar Tsarnaev unanimously voting he be put to death for his crimes. Four died over 200 injured. Some of those who survived are speaking out about the verdict. Nbcs pete wims has been covering this story from the start. Hes outside the courthouse now. Pete good evening. Reporter lester good evening. The jury deliberated just 15 hours after four weeks of testimony in this pep at phase of the trial, rejecting a plea from defense lawyers to send him to prison for life. Dzhokhar tsarnaev becomes the first person in the u. S. Sentenced to death for an act of terrorism in nearly two decades, since Timothy Mcveigh executed for bombing the Oklahoma CityFederal Building in 1995. We send a message, a strong message that were not going to tolerate terrorism. And i think whether you agree with the Death Penalty or dont, i think the message sent that theyre not going to blow up our marathon theyre not going to blow up our city. Reporter the jury unanimously said he should face the death penalties of the victims of the bombs he placed 8yearold richard and lindsey lie. But not crystal, for the bomb planted by his brother, or sean collier. There was no clear evidence about which of the brothers pulled the trigger. The jury rejected the claim that czartsarnaev was responsible for the bombings. He later slumped in his chair as he has throughout the trial. Victims and family members listened in solemn silence as the verdict was read. The parents of Martin Richard said nothing afterward. They publicly opposed the Death Penalty after he was found guilty last month. Liz norton whose construction worker sons lost their right legs in the bombings said shes grateful for the verdict. I feel justice for my family. Reporter Karen Broussard permanently injured agreed. Once the verdict came in it was like okay now we can start from here. And go forward. And really feel like its behind us. Reporter sydney corcoran who nearly bled to death and her mother lost both legs tweeted, my mother think now he will go away and we can go on. Michael ward put it this way. Hes going to go to hell. Thats where he wanted to go. Hes going to get there quicker than he thought. Reporter tsarnaev will eventually be moved to a prison in indiana, set to die in the lethal injection chamber. But it has not been used for a dozen years despite death sentences imposed on 44 criminals. Their executions delayed in part by the drugs used for capital punishment. Lawyers will begin a long process of appeal hoping to get the sentence reduced to life. This is going to last a decade or more. Were going to be hearing about this case for many years to come. Reporter several jurors wept after the verdict was announced, after 61 days of often gutwrenching testimony. Defense lawyers said sentencing tsarnaev to life in prison would be more appropriate, under severe restrictions. But the jury rejected that unanimously. Lester . Pete williams in boston tonight. Thanks. Another big story were covering this evening, a lot of late breaking developments into the investigation of the deadly amtrak disaster in philadelphia. This evening, investigators revealed what the engineer who was at the controls is telling them about the crash, and the fbi is now involved. Trying to determine if the train was struck by something before the crash. Nbcs tom costello has late details. Tom . Reporter hi lester. Good evening. The focus remains on this engineer but also on that other train that came through this north philadelphia area just before train 188 did. And that train was hit by a projectile. The question is whether was train 188 also hit by something. For the First Time Since tuesdays derailment ntsb investigators have heard from the man at the center of the investigation, 32yearold engineer brandon bostion, who said the last thing he recalls is ringing his bell as he left the north philly train station. He has no recollection of anything past that. He reported no fatigue throughout the day, or any illness throughout the day. Reporter just moments before tuesdays crash, another regional septa train was hit by a projectile shattering its theyve seen something suspicion on train 188s windshield. We have seen damage to the lefthand lower portion of the amtrak windshield that we have asked the fbi to come in and look at for us. Reporter the heavily used northeast corridor snakes through dense neighborhoods, for trains heading north from philadelphia station the track curves right, a 65mileperhour speed limit. Then accelerates on a straightaway to 80 Miles Per Hour for less than a minute and a half. Before braking to 50 for a sharp left curve. On tuesday, the train went into the curve at 106 Miles Per Hour. Engineer fritz elder worked the line for 25 years. The equipment we have is designed to accelerate quickly. It can quickly get away from you. Reporter to ensure engineers pay attention, alarms go off every few seconds requiring them to hit a button indicating their alert. The system is telling me this is a 40mileperhour curve. Reporter the new positive Train Control Technology could monitor and stop a speeding train but its not yet up and running on this stretch of track. Were committed to safety. Were going to have positive train control by the end of this year. Reporter an offduty employee injured in the crash has filed the first lawsuit against amtrak. Bruce phillips claims he was violently hurled inside the rail car and suffered possible brain trauma. Its negligence. Its beyond negligence you have a case here where theres active technology that could actually have avoided this accident. Reporter tonight the ntsb says its looking at video cameras from both trains for any signs of projectiles or suspects. Lester . Tom, thank you. Tonight confirmation of the news six military families have been fearing. The wreckage of a helicopter carrying u. S. Marines has been found in nepal where they were helping after the earthquake. Officials say there is no indication of survivors. The crew was based at Camp Pendleton near san diego. Our National CorrespondentMiguel Almaguer is there. Reporter the intense threeday search took rescue teams deep into nepals forest in the rugged unforgiving terrain the downed huey was spotted. They were selfless individuals dedicated to the mumt yan aid mission here in nepal. We are deeply saddened by the discovery of this recage. Reporter the six marines and two nepalese members aboard the victims have yet to be officially identified family members fear the worst. I told him many times that i was proud of him and i loved him. The biggest thing im going to miss from him is his hugs. Reporter chris was a helicopter pilot. A 31yearold High School Football coach who had just called home on mothers day. My sons my hero. And he is with me now, and always will be. Reporter 22yearold Lance Corporal jacob was a videographer in nepal documenting the relief effort. His father spoke in arizona. Youll never find a better son. Devoted and dedicated. And the love for his mother and his family like nothing youve ever seen. Reporter captain lucas was an aviation safety officer. We stand with nepal. Reporter his wife pregnant with their second child in san diego. Crew chief ward mark johnson iv was in charge of maintaining the helicopter. He was set to retire from the marines. The president today said these Service Members demonstrate the best of American Leadership and sacrifice. They went to that remote land to help people who suffered devastating losses in a terrible earthquake. They represent a truth that guides our work around the world. Reporter the helicopter that took off tuesday, part of an air Squadron Team based here from Camp Pendleton in san diego apparently sent out no distraes calls. Search teams will continue in just a few hours in nepal when the sun rises. Miguel thank you. A dangerous night may be in store for the planes where a number of tornado watches are in effect. A massive storm is moving across the country tonight stretching 1,200 miles long. It already produced at least one tornado an hour east of denver. The Severe Threat grows tomorrow with heavy rain large hail and strong winds forecast for much of texas and the midsection. And several states are also at risk for Severe Weather sunday. Texas in particular has been hit hard this week with heavy rains, creating a 40foot sinkhole in a parking lot in north texas. Tonight marks the end of a long week for jeb bush who stumbled on monday over a question about the iraq war. And has struggled since then to put daylight between him and his brothers legacy on iraq without appearing to turn his back on the former president. Senior White House CorrespondentChris Jansing has another on a potential blow to bushs white house ambitions. Reporter what had already been a pretty bad week for jeb bush today seemed to get worse. Im not planning to endorse anybody. Reporter the republican strategist behind george w. Bushs two winning president ial campaigns the architect, karl rove. Reporter was pointedly noncommit al about jeb. I want to win. And i have a long friendship with the family and a long friendship with jeb. But im like a lot of people sitting on the sidelines watching and waiting. Reporter an apparent snub. But analysts say bush may not want the endorsement. It would take us right back to the whole, is this just the latest chapter in the bush family. Reporter still, it adds to the growing perception that jeb bush is the man with the name and the money, the rep race remains wide open no clear frontrunner. Tomorrow in iowa bush will be one of 11 republicans speaking at the lincoln dinner. In iowa not friendly territory for jeb bush more moderate than the typical republican voter here. Plus theyre not happy hes decided to skip this summers straw poll. Knowing what we know now, would you have authorized the invasion . I would have. Reporter it would take three more answers over four days to finally get this. Would not have gone into iraq. Reporter the good news for jeb bush the Iowa Caucuses are more than eight months away. Chris jansing, nbc news iowa. This brings us to our political director chuck todd. Chuck, sounds like a lot of maneuvering room. Eight months is a lot of time. It sure is. I think the biggest news of the week is what we learned that not only is jeb bush not the frontrunner for the republican nomination but there is no frontrunner for the republican nomination. I think jeb had a bad week and it could linger for him. Maybe he doesnt know how to get out of his brothers shadow. But we realize it is a crowded field at the top. Scott walker is the man in iowa. Rand pauls the guy who polls best against hillary clinton. Jeb bush is the man with money. But with little else. And marco rubio is the buzz candidate. So thats the good news if youre a political junkie this is going to be fun to watch. But nervous for some republicans who dont like the idea that its this wide open. If its this wide open it leads to a lot of internal fighting. Well see you this sunday for meet the press. Republican president ial senator rand paul of kentucky as one of his guests. When disaster strikes, do you know the safest place to sit on a train to increase your chances of survival. We get the answer from the man who literally wrote the book on rail safety. Also the moment that stunned so many fans. A music star goes right over the edge. Out of 42 vehicles based on 6 different criteria, why did a panel of 11 automotive experts name the Volkswagen Golf motor trends 2015 car of the year . Well give you four good reasons. The Volkswagen Golf. Starting at 19,295, theres an awardwinning golf for everyone. My constipation and belly pain feel like a raging storm. Ive tried laxatives but my symptoms keep returning. My constipation feels like a heavy weight that keeps coming back. Vo linzess can help. Oncedaily linzess treats adults with ibs with constipation or chronic constipation. Linzess is thought to help calm painsensing nerves and accelerate bowel movements. Linzess helps you proactively manage your symptoms. 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According to the experts, it may all depend where youre sitting. Nbcs Stephanie Gosk explains. Reporter the aerial over train 188 tells the deadly story. Thats the first car ripped apart. The second car didnt fare much better. At least two of the passengers killed were in those two cars. Where People Choose to sit on a train can determine whether or not they walk away from a crash. Ive always told my wife to sit in the middle of the train. Reporter larry mann is the author of the federal Railway Safety act. Ive been involved in Railroad Accidents since 1970. And ive analyzed numerous accidents. The middle of the train is by far the safest. Reporter there is no definitive study, but there are recent examples that suggest the first and last cars can be the deadliest. Whether the accident in ontrack collision or a derailment. In 2008, a california commuter train barreled into a freight car. 25 killed, 22 of them in the first car. In 2013, a new york city commuter train derailed killing four people. All of them were sitting in the first three cars. If youre fortunate to find a seat in a middle car, preferably on the aisle away from the windows, it doesnt necessarily eliminate all the risks. In a derailment, especially on a short train, every single car can topple over. In the uk, a broken rail crash killed four people. All of them were in the cafe car, the seventh of nine cars on the train. Trains still remain one of the safest ways to travel. In the u. S. , in 2013, only six train passengers lost their lives. Compare that to the 28,000 deaths on the road. The seat behind the wheel still far more deadly than any seat on a train. Stephanie gosk, nbc news, new york. Up next tonight, late word about an iconic store beloved by so many kids. Whats happening to the place where tom hanks famously danced on the keyboard. I told myself for so long that i needed to quit smoking. I would quit then id go right back to it. 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Meantime the edge posted a photo of his bruises on instagram with the caption, didnt see the edge. Im okay. When we come back, farewell to the king. A look back at the life and music of a blues legend. At chase, we cay through programs like mission main street grants. Last years grant recipients are achieving amazing things. Carving a name for myself and creating local jobs. Creating more programs for the little bookworms. Bringing a taste of louisiana to the world. At chase, were proud to support our grant recipients and Small Businesses like yours. So you can take the next big step. Allergies can distract you. So when your symptoms start, doctors recommend taking nondrowsy claritin every day of your allergy season. With claritin, you get powerful, nondrowsy relief 24 hours a day, day after day. Which is important because with fewer symptoms to distract you you can focus on the extraordinary things you do every single day. Live claritin clear. Every day. Who. 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King was an ambassador of the blues, went from Humble Beginnings to worldwide fame in a career that spanned decades. B. B. Kings voice and those signature guitar licks helped propel the blues into the mainstream. The undisputed king of blues was born riley b. King in 1925 on a mississippi delta plantation. His break came in memphis, where he got radio play, club dates, and that nickname. I never asked you what b. B. Stands for. It stands for blues boy. I was a disk jockey back in memphis at the beginning of my career. And they called me the beal street blues boy. His first hit came in 1951, 3 00 blues. But this 1969 classic became his signature song. The thrill has gone away he called his guitar lucille. And boy, could he make lucille sing. Even some of his famous peers looked up to him. How much of an influence has he had on your life, and your career . Every guitar player that i know those shoes will never be filled. Rock stars who loved the blues, loved b. B. King. Rock me baby eric clapton remembered his friend today. He was a beacon for all of us who loved this kind of music. And i thank him from the bottom of my heart. 15 grammys, a member of the rock n roll hall of fame, the president ial medal of freedom. He even sang with a president. Aint no place like sweet home chicago people call me king of the blues. Ive heard it many, many times. Do you think i think that . No, i dont. I think there are a lot of people doing exactly what i do, and a lot of them can do it better. Not just me. B. B. King was a timeless national treasure. Got to be a better world b. B. King was 89. And boy, will he be missed. Thats going to do it for us on this friday night. Im lester holt. For all of us at nbc news, thank you for watching, and good night. Lights camera access. Many of them say youre a hypocrite. Once again, he dances around the questions, but did cosby just finally acknowledge he has