air. u.s. investigators tell abc news they are considering the possibility, based on new clues, that what went on inside the cockpit of this plane may not have been an accident. all of this as a u.s. ship races to a new location in the indian ocean. and abc's david kerley brings us the breaking details, right now. david? >> reporter: good evening, diane. tonight, two sources tell abc news, that two communication systems on this 777 were shut down separately, suggesting there was not a catastrophic failure. american ships are on the move, tonight, looking for that 777 jetliner, even farther away from its original flight path. then, the transponter reporting altitude and position, shut down about 40 minutes into the flight. a systematic shutdown. this, as we learned the plane flew up to four hours beyond its last sighting on radar. they know this because the jet was apparently pinging a satellite every hour. it's part of a monitor system airlines can pay for to keep track of their jets in the air. malaysia airlines was not paying. but our sources say, even if the airline is not buying the data, the jet sends a signal to the satellite. >> based on some new information, an additional search area may be opened in the indian ocean. >> reporter: tonight, american ships are on the move. looking for the 777 jetliner even farther away from its flight path. saying there's an indication the jet went down in the indian ocean. the indication comes from u.s. investigators in malaysia, who have now pored all over that radar and other data. so, the search grid is getting bigger and could get much bigger. even though in jet may have sent pings to the satellite, it's unclear which way the jetliner was flying. the satellite pings do not give direction and would not be able to transmit from the bottom of the ocean. >> i don't think if the aircraft is under water, that you'll get a valid signal coming up from the bottom of the sea up through that water up to the satellite. >> reporter: with our sources telling us the communications system shut down intentionally, it suggests a hijacking or pilot suicide. now, the search area is shifting to the massive indian ocean. as i showed you in the graphic. 2,400-square miles. they'll do a grid over it. it will take months to search, diane. >> thank you, david. so, if it is possible there was control still inside the cockpit as the plane was airborne for hours, could it have reached land? and if so, where? abc's bob woodruff is in malaysia with the possibilities and the map. >> reporter: could the plane have soared straight past where they are searching in the ocean? crashing on dry land? or even landing safely? the closest island to the possible path is here, pulau perak. but it is a tiny, rocky spot, jutting out of the ocean. no likelihood of a landing. further out, we reach the remote andaman and nicobar, a group of nearly 600 tiny islands and rocks, some popular with tourists. but only 37 of the islands are actually inhabited. the others are full of dense forest, but isolated. beyond that, the vast indian ocean. but if the plane was flying for four or five hours, widen out the lens. and you see the plane could have reached as far as the jungles of thailand, myanmar, even the eastern coast of india. the plane had plenty of fuel to reach those locations. and experts say, here in this remote part of the world, there are spots where radar doesn't reach. now that search and rescue operations here in kuala lumpur are certainly in full force. many are wondering, if that plane was traveling for hours from here, would some of the search be shifting in that direction? maybe even scouring the land? that, diane, is a very big question. >> bob, thank you so much. and now, i want to bring in abc's aviation expert, steve ganyard. steve, this is an incredible breakthrough tonight. incredible news. >> incredible turn of events just from what we knew yesterday. yesterday, we knew nothing past that 49-minute mark. today, we're pretty sure that what happened was two switches were pulled in that cockpit. >> and you say were pulled. that suggests deliberate. >> deliberate. >> what kind of deliberate acts? >> well, maybe it was a hijacking. maybe it was pilot suicide. maybe there was some elaborate plan to take this airplane somewhere and do something with it. but all of the things we were thinking about yesterday, with catastrophic kinds of things, we're probably leaning more towards something the pilots or one of the pilots did, that involves something catastrophic. what the deliberate act might be, still to be determined. >> and again, it went on for four hours. >> four hours. that's the other big news of the day. we thought this airplane should have crashed at the 49-minute mark. we now know it flew for four to five hours. think about how far that airplane could have gone in four to five hours. >> and we know this from some u.s. capability, i'm assuming. does this mean that we also know, pretty much, exactly where the plane is? >> unfortunately not. the data that apparently is coming out, just says that the plane was airborne. it doesn't tell us what direction it was going. it doesn't tell us how fast it was going. all we know, is this plane was flying. it could be anywhere between 2,000, 2,500 miles. >> is it possible, as bob was reporting, is it possible that this plane could have landed some place and we have no idea where they are? >> it's possible. it's possible. but, boy, that would be a stretch. >> following a new twist in the clues tonight. as you said, what a difference a day makes in this story. thank you, steve. and the entire abc news team will be staying on the story, to bring you minute-by-minute new details. and now, we turn to other big news of this day. ukraine, and the growing fear of russian military action. tonight, thousands of russian troops are amassed on the ukraine border. the vote on the future of crimea, just days away. and abc's alex marquardt is there to report on the danger as the clock is counting down. >> reporter: preparing a full-scale invasion. that's what ukraine fears these russian forces are doing. almost 9,000 troops, hundreds of tanks and artillery, deployed right on ukraine's doorstep. pro-russian forces already control ukraine's crimean peninsula, which after a referendum on sunday, will almost certainly ask to join russia. >> there's no justification, no legality, to this referendum that is taking place. >> reporter: so far, neither threats nor diplomacy have produced results. and ukraine instability is becoming deadly. in the eastern city of danesk, two reported killed, when pro-russia demonstrators clashed with a pro-ukraine group, an ominous sign of a country being pulled apart. president putin said today, russia didn't instigate the crisis. but he appears ready to welcome crimea. and the question is, will he want more? alex marquardt, abc news, crimea. >> thank you, alex. and the unrest in the ukraine rattled american stocks here at home. the dow in freefall more than 200 points, after news of the russian troops on the move and the tensions rising. and we also have news, tonight, about sports and consequences. every year, more than 250,000 children suffer a sports-related head injury, including concussions. and today in washington, the reality of those numbers took center stage. here's abc's senior national correspondent, jim avila. >> reporter: americans love hard hits. but today on capitol hill, athletes, league officials and doctors, warned parents of the danger of little kids playing big kid sports, from hockey, to lacrosse, soccer and football, the most hazardous. the average high school football player, hit in the head 652 times a season. the hardest of those hits exceeds 150 gs of force. that's like dropping a bowling ball on the player's head. but surprisingly, soccer ranked second for head injuries. typically heading the ball up to 12 times in a single game. watch again. that black and white sphere, traveling up to 50 miles per hour. >> i don't remember being hit. and i don't remember falling over. >> reporter: among those testifying, briana scurry, who made the biggest save in american women's soccer. stopping the chinese and winning team usa its first world cup. but her career ended violently on this knee-to-head collision. >> i'm still suffering from some of the effects of that hit. >> reporter: scurry hasn't played since. and now preaches to parents the importance of recognizing a concussion and getting out of the game. >> you start to feel a little bit woozy or sick to your stomach, you have to tell either a teammate, the referee or your coach. >> reporter: today's capitol hill witnesses, urging parents and coaches to change the culture of sport in america. teaching athletes, large and small, amateur and pro, that playing hurt is no longer okay. jim avila, abc news, washington. and here at home, late word of a plane incident in philadelphia. an airport spokesperson says passengers have been evacuated from a plane that was trying to take off this evening. but a blown tire forced the plane to skid off the runway. people climbed out the emergency exits and slid down the escape chutes. and all 149 passengers were evacuated safely. and now, our "made in america" team is back. and there is news out of washington. taking the challenge to the pentagon. we've been asking the question, should america's fighting forces wear clothes and shoes made in america? well, abc's anchor, david muir, tonight, with a big decision coming. and the u.s. workers who say let us do it. >> reporter: that's right, diane. as you know, we heard the questions from the very start from our viewers. do american workers make the american uniforms? a 1941 law requires it. but tonight, the loophole and the one item workers are hoping soon will be "made in america." our troops in uniform, all over the world, protecting us and the american dream. that uniform, every part of it, made in america. and to get into those uniforms, our troops, far more fit than most of us. even their gym clothes, the t-shirt made here, the shorts made here. but there's something afoot about their sneakers. the only part made overseas. many wondering why is the federal government spending millions in taxpayer dollars on sneakers made some place else. could we find sneakers made here? didn't take long. this is the sneaker lab. new balance, among the companies making sneakers in america. >> if it says made in the usa, that means, 100%. >> reporter: watch here, as she puts the sneaker into a steam machine. so, the shoe is loosening up there. soft again. all it needs now is the sole, which comes next. so, if we could find them, what about washington? we calmed the pentagon. and tonight, they tell us, the department of defense has heard from several u.s. shoe manufacturers saying they could produce a 100% american-made shoe. the pentagon adding, we're evaluating their proposals. and on capitol hill, some lawmakers on both sides of the aisle now saying, it's a no-brainer. we found senator susan collins among those pushing the pentagon. she told me about the labels on the sneakers right now. >> they're made in vietnam, in china, all over the world. >> reporter: she points out a 1941 law requires every part of the uniform be made in america. but that there's a loophole when it comes to sneakers. she also pointed out, she's watched our "made in america" series because back home -- >> i have heard the conversation change in america. >> reporter: fueled, she says by the very workers in their home state. three new balance factories, where they're sending a message. >> we can make it here. >> reporter: they also sent us the very prototype they pitched to the pentagon. they're not the only ones. cap shoes in virginia. wolverine in michigan, all saying, we can do it here. hoping washington is listening. back where they're making the sneakers tonight, that ultraviolet pen, invisible ink, marking where the sole is glued to the sneaker. the customer never sees those markings. but we left a message anyway. the customer will never know i wrote this. someone, somewhere, soon wearing sneakers with those three words, made in america. you make them for customers. >> yes. >> reporter: the question is, will you make them for the troops? >> i hope so. >> reporter: you hope so. a lot of people hoping so tonight. the troops' families send us great videos, jumping in. since we started "made in america." tonight, this is up to the pentagon. and a spokesman telling us in the last 24 hours, they like what they're seeing with the proposals on their desk. in fact, tonight, new balance telling us, they would be able to hire at least 200 new workers if they get the go. >> that's one company. we will be watching their decision. thank you, david. up next, tonight, the high drama in court today. oscar pistorius' girlfriend. never-before-seen photos of that crime scene. and it had him hiding his eyes, when we're back in two minutes. i dbefore i dosearch any projects on my home. i love my contractor, and i am so thankful to angie's list for bringing us together. find out why more than two million members count on angie's list. angie's list -- reviews you can trust. you know how painful heartburn can be. for fast, long lasting relief, use doctor recommended gaviscon®. only gaviscon® forms a protective barrier that helps block stomach acid from splashing up- relieving the pain quickly. try fast, long lasting gaviscon®. and next, tonight, a powerful drama, today, in the trial of olympic athlete oscar pistorius. for the first time, graphic photos of his girlfriend, killed by his gunfire. the superstar athlete, the model, once a glamorous couple, posing for the cameras. but today, the man called blade runner covered his eyes. abc's matt gutman, back in the courtroom tonight. >> reporter: the world sees for the first time, that bloody scene. oscar pistorius' blood-smeared prosthetic legs. blood pooled on the bathroom floor. last valentine's day, pistorius killed his lover, reeva steenkamp, claiming he thought it was an intruder. oscar and reeva, together, they were tabloid royalty. now, he faces a different barrage of cameras. charged with premedicated murder. and today, during testimony, when steenkamp's bloody face flashed on the screen, he began heaving. covering his head with papers. it would only get worse. one of the first cops on the scene, then testified about what he saw that night. and that police colonel, taking us from the witness stand, out of the courtroom, and through this high-security wall, with electrified fences, right into oscar pistorius' house, with a trail of blood. slides showing the bloody towel used to stop steenkamp's wounds. pistorius' air rifle. the cell phones in the bathroom and its shattered door. it was reinstructed in center court. key evidence. pistorius claims, when he realized it was steenkamp, he put on prosthetics to bash down the door. but with repeated whacks, a forensic expert for the prosecution, suggested that he lied. >> the marks on the door is actually consistent with not having his legs on. >> reporter: the prosecution accused him of lying about that night, suggesting steenkamp's death was anything but an accident. matt gutman, abc news, pretoria, south africa. >> and abc news has been told that pistorius will take the stand during the trial. when we come back here, was princess diana giving palace secrets to the tabloid enemy? 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[ mala body at rest tends to stay at rest... while a body in motion tends to stay in motion. staying active can actually ease arthritis symptoms. but if you have arthritis, staying active can be difficult. prescription celebrex can help relieve arthritis pain so your body can stay in motion. because just one 200mg celebrex a day can provide 24 hour relief for many with arthritis pain and inflammation. plus, in clinical studies, celebrex is proven to improve daily physical function so moving is easier. celebrex can be taken with or without food. and it's not a narcotic. you and your doctor should balance the benefits with the risks. all prescription nsaids, like celebrex, ibuprofen, naproxen and meloxicam have the same cardiovascular warning. they all may increase the chance of heart attack or stroke, which can lead to death. this chance increases if you have heart disease or risk factors such as high blood pressure or when nsaids are taken for long periods. nsaids, like celebrex, increase the chance of serious skin or allergic reactions, or stomach and intestine problems, such as bleeding and ulcers, which can occur without warning and may cause death. patients also taking aspirin and the elderly are at increased risk for stomach bleeding and ulcers. don't take celebrex if you have bleeding in the stomach or intestine, or had an asthma attack, hives, other allergies to aspirin, nsaids or sulfonamides. get help right away if you have swelling of the face or throat, or trouble breathing. tell your doctor your medical history. and find an arthritis treatment for you. visit celebrex.com and ask your doctor about celebrex. for a body in motion. our "instant index" begins with a stunning moment in the british courtroom today, naming the shocking secret source for a tabloid journalist, princess diana herself. according to an editor at "the news of the world," on trial for hacking phones. he claims princess diana sent him the royal phone book in a covert wrapping because she wanted him to tell the world that prince charles had an army of people working for him. but she had almost no one. and felt the palace was out to get her. it's hard to believe that one year since a shy cardinal from buenos aires walked on to the balcony as pope francis. he marked the anniversary, today, with his tweet, please pray for me. he also received an invitation from u.s. congress to address a joint session. if he says yes, it would be a first-ever for a pope. up next, right here, could strangers heal the tiniest babies? see the difference their touch is about to make. it's "america strong." 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[ male announcer ] if you can't afford your medication, astrazeneca may be able to help. and finally tonight, what if you had the power to heal? like a doctor, but with a different kind of medicine? abc's david wright, now, with the strangers saving fragile lives. and they are "america strong." >> reporter: the neonatal intensive care unit. full of buzzers, bells, machines, safeguarding the most fragile human lives. babies like oliver and sky, twins born three months premature. >> hello. >> reporter: how reassuring, then, is the sound of that voice? ♪ when you're smiling >> reporter: oliver clings to it. and that's not his father. not even a nurse. pat rice is a volunteer cuddler, at the lucile packard children's hospital, stanford. he and his wife, claire fitzgerald, have been cuddling babies here for 16 years. the nurses were telling me that these cuddles have an immediate impact for these infants. it's measurable. you look at the blue number here, apparently that's blood oxygenation. and as it starts to climb, it means the baby's relaxed, breathing deeply. dr. ronald cohen says cuddling leads to better tolerance of pain, more stable body temperature and stronger vital signs. >> if you remember back to your own childhood, mom's hug was the best medicine. that hug is the best medicine. >> reporter: for oliver and sky's parents, the cuddlers are a godsend. >> you can't be here 24 hours a day. and it's very comforting knowing while you're not here, there's someone holding your child, tenderly loving your child. >> you know, these people are scared to death. >> reporter: you're there to cuddle the parents as much as you are the baby? >> it seems that way, yeah. >> reporter: high-tech medicine can make miracles happen. ♪ when you're smiling the whole world smiles with you ♪ >> reporter: but a song and a smile, plus that human touch, that's what will make these babies "america strong." david wright, abc news, palo alto. >> and baby oliver's parents tell us he's home now and doing well. and thank you for watching. we're always here at abcnews.com, with the latest. "nightline," later, as well. and we'll see you again tomorrow night. good demolition work at mission bay fire sight. the rush to return people home. what happens to all of the rubble? >> happening now emergency repairs to a century-old water line the rupture made it doifl get around town. >> a three-point plan for protecting students in two oakland schools. and fitness fans who refuse to give up their fit bits despite the government recall. >> ongoing demolition work tonight at the scene of the mission bay area. 48 hours later they're looking for hot spots and flare ups. good evening, i'm dan ashley >> the job is challenging as the demolition work continues. investigators are still not allowed into the site the destruction spans a city block. abc7 news has more but we begin at the scene. sergio? >> they're making progress. you can see there is a ladder. as this fire is going there are questions as to how it started a lot of the questions remain. including how much of the structure can be salvaged i'm told inspectors can get in there. so far no one has gone into the building including investigators. >> it's imploding down on to its self. it would not be safe to allow people to operate. >> the engineers will have to take core samples. that will help them decide. there is another area that needs to be dealt with. >> my team is here evaluating damage to our common area that we maintain. it's everything you can see underneath.