welcome to "world news." tonight -- new information in the mystery of flight 370, what we're now learning about that part of the indian ocean, why it could be one of the worst possible spots for the search. plus, your questions here tonight. why no submarines, why no gps on the black box, and why are pilots able to turn off the tracking system in the first place. what it means for everyone who flies. your tax refund. stolen. tonight, the major warning about a scam just in time for tax day involving tens of thousands of refunds. how to protect yourself right now. the best sunscreen and the burning question tonight -- if you could buy it around the world, why is it so hard to find here in america? getting answers. and solved. the real story tonight about how he got this puzzle right with just two letters.

"world news" starts now. good evening on this friday night. diane is back on monday. and we do begin tonight with the search just now under way again as we come on the air tonight. it is daybreak in that part of the world, that key part in the indian ocean, off of australia, right there, the route most likely taken by that missing jet and the area they're most concentrating on tonight. satellite showing possible debris marks from that plane this week. just look at the arsenal this morning, abc's david wright, the only american reporter onboard this week that secret naval ship, tonight, he reports the infrared cameras the radar being deployed. we have team coverage on it.

we repeatedly heard from you, why no submarines. but we do begin here with david as they search again. >> reporter: good evening, david. as dawn breaks here, in australia, the search effort has already resumed. more search planes joining the fleet. today, six australian and new zealand aircraft will be combing 22,000 square miles. the size of west virginia. a search effort of unprecedented scale, combining state of the art technology and painstaking effort. six search planes, out from dawn until dusk. dropping marker buoys. plotting coordinates. and scanning the waves. but, so far, coming up empty. the eye in the sky, pinpointing these objects out in the open ocean. the best lead yet. the smaller one just 15 feet long, the length of a car. but getting a closer look is proving to be difficult. >> it's about the most inaccessible spot you could imagine on the face of the earth. >> reporter: the ocean here is dynamic. watch this boat tossed by the

high seas. the waves up to 20 feet high, winds howl, currents tear in different directions, that makes tracking any debris a challenge. the search planes have sensitive radar, infrared cameras and high-res optical lenses. but, as we witnessed yesterday abroad that u.s. navy p-8, in choppy seas, a pod of dolphins can look like debris from a distance. the only reliable instrument? distinctly low tech. the human eye. >> we call it the mark one mod one eyeball. >> reporter: say it again? >> the mark one mod one eyeball. it's old fashioned but it works. >> reporter: eventually, there may be eyes under water too. submersibles like the remus 100, used to help locate air france 447. this is a costly endeavor. the cost to the u.s. taxpayers alone, about $2.5 million. but i think most would agree that it's a small price to pay for answers.

david? >> david wright tonight, thank you. and for the first time we're hearing from the family of the lead crew member on that flight. their anguish and their anger now, bob woodruff tonight. >> reporter: this is the home of patrick gomez, the chief steward of flight 370, three daughters, one son, a grandson and his wife, jackie, says he keeps calling his cell phone, praying that he is still alive. >> i call him on the phone, left him a message, hoping that he'll reply. >> reporter: there have been vigils from pakistan to china, to malaysia and more. but there is also growing anger that the malaysian government isn't being honest. one official kept calling the family next of kin. >> i think we all need closure.

>> reporter: he's still just waiting for his grandfather, he has no idea what's happened. what are you going to tell him? >> he still thinks that grandpa is at work. he still doesn't understand. >> god has plans for all of us. 6 maybe god has a good plan. >> reporter: since he's gone missing, patrick's family has been burning this candle, hoping he finds his way home. whether he survives or does not. bob woodruff, abc news, kuala lumpur. >> bob woodruff reporting in again tonight. bob, thank you. we're now 14 days into this, last night right here, we asked you to send in your questions on this mystery flight. you did. we got hundreds of them while "world news" was still on the air. i want to bring in our aviation expert john nance. john, so many viewers asking the same thing, why isn't there a satellite gps locateor on the black box? >> he's exactly right. the problem is, if this thing is

under 15,000 or 16,000 feet of water, you can't get a radio signal out to reach a satellite. i agree, if we can find an engineering solution that would be excellent. >> and john, the next question has to do with the cockpit and the pilots them, cody asking, is there a legitimate reason to turn off the trackers? pilots shutting down the systems that track their planes in the first place. >> well, we don't expect our pilots to be hiding and turning off the equipment for that purpose, so the system is not engineered that way. we have a legitimate need to turn those things off, because if they're in the air and they malfunction, the same thing on the ground, too many airplanes on the ground squawking those systems could be a problem. >> will that change thinking here? >> it could. but then, again, we have 93,000 flights a year over the earth. every one of those gets to their destination. almost always. we have never had this happen before. i want to bring in david kerley, who's been with us every step of the way. the next question for you, david.

this came up repeatedly, a viewer asking, why aren't they using submarines to help in the search? >> that's a good question. the u.s. doesn't talk about what its submarines are doing or what they can do. the reason is, they work at 20,000 feet down, but they only radiate a signal about a mile, so you really have to be on top of it to actually hear it. so the sub may not be the best tool to do that with. but we don't know whether they're actually using them or not. >> to hear it, you're talking about the pinging, we know there are about two weeks later, this is what the sonar equipment would hear, you can't hear it with the human ear, this is what the pinging would hear like with those hydrophones. john, you know that sound well. gena asks -- how long after the original 30 days does the data remain viable inside those black boxes? >> it will be there for many years. because it goes on to a computer chip, as long as that chip is not compromised the data is there.

>> all right, we're going to stay on this. gentlemen, we thank you both. keep the questions coming. remember to tweet us. #askworldnews. we'll do this again tomorrow night, right here. in the meantime, the other developing story, the fallout after the war of words between president obama and russian president vladimir putin, first u.s. sanctions against russia, and then putin firing back. and tonight, with one stroke of putin's pen, he made it official. just look at the map tonight. crimea, that strategic part of ukraine, south, no longer part of ukraine, now part of russia. president obama saying the u.s. will not recognize that new map. i want to bring in abc chief global affairs correspondent martha raddatz, last year tonight, we reported on putin laughing off those sanctions, imposed by president obama, any sign tonight that putin is feeling the pain? >> on paper it seems like it. the russian stock market is weaker, but absolutely nothing has changed in terms of what putin has done in crimea or what

he might do next. in fact, the number of troops on the border of ukraine is steadily increasing by the day. 20,000 to take parts of eastern ukraine and they could do it with little or no warning. >> and that's the big question, so what are your sources telling you, martha, how likely is it that putin will go further on this? >> they're saying it's a spring military exercise. but they're saying the u.s. is very skeptical of that. lots of worry, david. >> martha, thank you. martha will have much more, she's in for george this weekend, sunday, right here on abc's "this week." we turn now to the images making headlines out of china, tonight, first lady michelle obama and the surprise greeting the chinese president unexpectedly coming out to meet her. the choel thing renice reminiscent of richard nixon. a new american ambassador, today the moment that surprised even the chinese and abc's chief

white house correspondent jonathan karl on it all. >> reporter: it's not quite the ping-pong diplomacy that preceded nixon's visit. but first lady michelle obama kicked off her trip with a little table tennis at a high school in beijing. with the president back home, the first lady along with her daughters and her mom are on a five-day tour, building goodwill and seeing the sites. checking out the forbidden city. in a surprise, china's president greeted the obamas. this, after their guide for the day was china's glamorous first lady, herself a longtime chinese pop star. she proclaimed an instant bond with mrs. obama, although it's the first time we have ever met, she said, it feels like we are old friends. unlike laura bush and hillary clinton who both pressed human rights on their trips to china,

the white house says that mr.s obama will shy away from issues that might be controversial with her chinese hosts. >> jon, thank you. we turn now to your money tonight. your tax return. with tax day approaching, a startling warnings, tens of thousands of americans scammed, even the police fooled on this one, more than $1 million and counting. abc's chief business correspondent rebecca jarvis with how to protect yourself. >> reporter: this tax season, from coast to coast, criminals are going further than ever before to get their hands on your money. >> i'm calling from the irs. >> reporter: the treasury department warning tonight -- criminals are posing as irs agents and police, telling people they owe money and must pay at once. anyone who refuses is threatened with arrest, deportation or suspension of a driver's license. some of the scammers even leave voice messages with callback numbers. he was told to pay up and only with cash. >> no credit card, no debit card. no checks. >> reporter: we tried dialing

one of the scam numbers given to us by the police. it was still working. >> sorry i'm not available right now, please leave your message. >> reporter: clearly the person on the other end of that phone wants you to think he's a police officer. his voicemail picks up after one ring. he says, i'm an officer and here's my badge number." some are going even further. police say a scammer even made this 911 call when a victim refused to pay up. >> please send officers. i need some help. >> reporter: the objective scamming the victim to think that the police were coming to arrest him for not paying the taxes. the irs says that this is the largest scam of its kind. but you can protect yourself, remember, the irs is never going to call you and aggressively demand money. call the number back online and the irs does not call you. >> they're not going to do. rebecca, thank you. now to an update on a story you covered for us. tonight, a new lawsuit against general motors over that massive recall, the families of two teenagers killed in a crash filing suit against gm because of that faulty ignition switch

that led to the recalls of more than a million and a half cars. gm did not comment on the suit. it's focused on ensuring the safety of all customers involved in the recall. next tonight, to a brewing battle over sunscreen, the headline we first saw in "the washington post" this morning, some doctors pointing out that certain sunscreens last longer and are better for your skin. the problem is, they say, some say, the key ingredients are easier to find out of the country. abc's ryan owens getting answers tonight. >> reporter: a beach day in rio versus a beach day in california. it turns out those brazilian beach bums have considerably more choices than americans about how to protect their skin from the sun. sunbathers in europe and parts of latin america can choose from at least seven more uv filters. >> the united states needs to speed up. >> reporter: many dermatologists agree.

they have joined forces with sunblock manufacturers to push the food and drug administration to approve a backlog of stronger sunscreens that last longer and feel better on the skin. >> unfortunately, the fda doesn't always accept the research in the studies that have done abroad and there's a backlog through the fda. >> reporter: the fda hasn't approved a new sunscreen in 15 years. in 2006, the agency did approve the breakthrough chemical but only for sale by one company. that's because europeans have been using it since 1993. the fda tells abc news it, "remains committed to allowing sunscreens containing additional ingredients available to consumers if there is enough data to show that they are generally recognized as safe and effective." >> it would be nice to have more options to protect your skin. i mean, it's important. >> reporter: there are plenty of sunscreens for sale right now in the united states, the question tonight, should there be more?

even the fda seems inclined to think so. next week, they'll hold a series of public hearse to discuss their approval process. still much more ahead on "world news." the real story behind that "wheel of fortune" stunner. but first, the view from 3,000 feet. what they are about to do. we're back in two minutes here. ...return on investment wall isn't a street... isn't the only return i'm looking forward to... for some, every dollar is earned with sweat, sacrifice, courage. which is why usaa is honored to help our members with everything from investing for retirement to saving for college. our commitment to current and former military members and their families is without equal.

millions have raised their hand for the proven relief of the purple pill. and that relief could be in your hand. for many, nexium helps relieve heartburn symptoms from acid reflux disease. find out how you can save at purplepill.com. there is risk of bone fracture and low magnesium levels. side effects may include headache, abdominal pain, and diarrhea. if you have persistent diarrhea, contact your doctor right away. other serious stomach conditions may exist. avoid if you take clopidogrel. for many, relief is at hand. ask your doctor about nexium. next tonight here, we're with a team of extreme athletes, dangling thousands of feet above the earth with a lesson for everyone about facing your fears. and who did we send? the correspondent afraid of heights, the brave abc's lama hasan. >> reporter: we're floating 3,000 feet above space to witness an unprecedented stunt by a team of french daredevils.

>> if you're afraid, you need to switch off your brain. >> reporter: two years in the making and a lifetime of training have come down to this -- they'll attempt to walk untethered from one hot air balloon to the other, staring down danger and possible death is a way of life for these stuntmen. but it's something that i'm having trouble with. as i went to train with them in france. you see, i am terrified of heights. i'm trying. >> just look down into the valley. just try. >> reporter: no, no, no. >> overcome your fear. face your fear. >> reporter: i can't. these daredevils admit they too have fear, but they have learned to conquer it by facing risk, acknowledging their fear, making a plan and pushing off. back in spain, it was now or never for me to battle my fear. oh, god, this is going to make me throw up. but, at last, i'll be crying. just going up in the balloon

makes me start to panic but their excitement as they attempted the impossible is so infectious that i surprised myself. did you know how those guys were telling us, you have to push yourself and face your fear, i have pushed myself like i have never pushed myself before. lama hasan. >> see it all unfold on "nightline" prime tomorrow night. when we come back here -- the image going viral across america tonight and across the globe, what a way to start the weekend. you got to stay tuned for the story behind this moment. you got to stay tuned for the story behind this moment. story behind this moment.

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we made it to friday in our "instant index" tonight. an image being shared across the globe tonight, a tender good-bye between this giraffe and the man who cared for him. it happened in holland. that caretaker battling a very tough disease, his one wish -- to say good-bye to the animals he loved. again, so many people sharing it on facebook tonight. it was last night here we showed you that unbelievable moment on "wheel of fortune." pat sajak and vanna white in disbelief when the contestant guesses "new baby buggy," with just two letters revealed, and tonight, we learned that he's a nursing student, he's been spending all of his time in pediatric unit. he had babies on the brain.

new baby buggy, he said, sprang to mind. when we come back here -- behind the scenes of one boston comeback. using a prosthetic leg, a ballroom dancer this week stunning an audience and the pictures of her dancing exclusively right here after the break. our "person of the week." exclusively right here after the exclusively right here after the break. copd includes emphysema and chronic bronchitis. spiriva is a once-daily inhaled copd maintenance treatment that helps open my obstructed airways for a full 24 hours. spiriva helps me breathe easier. spiriva handihaler tiotropium bromide inhalation powder does not replace fast-acting inhalers for sudden symptoms. tell your doctor if you have kidney problems, glaucoma, trouble urinating, or an enlarged prostate. these may worsen with spiriva. discuss all medicines you take, even eye drops. stop taking spiriva and seek immediate medical help if your breathing suddenly worsens, your throat or tongue swells, you get hives, vision changes or eye pain, or problems passing urine. other side effects include dry mouth and constipation.

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finally tonight here, our "person of the week." a ballroom dancer and a dream dashed in the boston bombings. but she was not about to let them win. it was nearly a year ago now, april 15th, it started out as a gorgeous day in boston, adrianne haslet-davis back by her husband's side, along the route of the boston marathon, he just returned from afghanistan. she was so excited to tell everyone, adam's home. >> we weren't planning on going to see the marathon. we just wanted to hang out together. we were celebrating the fact that he got back without injury. just really great. as we were walking towards the finish line, a bomb went off. i wrapped my arms around him, underneath his arms, around his chest. >> reporter: adrianne and her husband standing just a few feet away from the second bomb, her husband with shrapnel to his

leg, adrianne's foot nearly blown off. >> i remember them saying you might have lost your leg, and i said, no, no, that's not going to happen because i'm a dancer. so, that's not an option. >> reporter: but doctors had to, amputating her lower left leg. and so began the journey of intense rehab and intense pain, both physically and emotionally. her husband, right there beside her. she would spend an entire year determined to get back on her feet with help from her new prosthetic leg, determined to dance again, and this week at the ted conference in vancouver, she was about to stun the crowd. behind the scenes she was in tears. >> we stopped for a quick second. i just started bawling. even before i even got out there and the stage manager was very sweet, she's throwing tissues at me. >> reporter: she handed you the tissues and said, get out there and dance. >> it was like, wipe those tears away. >> reporter: and tonight, right

here for the first time, you're seeing what she did. ♪ >> adrianne dancing again. the rumba with her dance partner, christian. hardly a dry eye in the room. >> it just felt -- i felt victorious. before the dance even started. i wasn't going to let this stop me. you know, when i have hard days and when i think i can't do something, i just tell myself that i'm not going to let them win. that gets me right back on my feet. >> and so we choose adrianne haslet-davis. watch for the stunning walk coming soon. warnings about this year's fire season, what you can do to reduce danger. >> oakland's payout to an iraq war veteran. >> the i team investigates another local man claiming to be

a navy s.e.a.l. but this time it goes to a phony business. >> the post office stopped delivering mail to a bay area woman for months on end. michael finney explains how you can avoid the same this is more typical of august. . >> i raging fire in pittsburgh may be just a harbringer of things still to come. officials say due to the drought, they're bracing for a fire season like no other. good evening, officials say conditions look like mid summer rather than the start of spring the state is in a drought. areas in red on the map are an extreme drought. maroon areas in an exceptional drought, as bad as it gets.

we're live in pittsburgh with more. laura? >> hi, carolyn. one fire official told me that people should start working on defensible space around their houses. investigators believe the fire may have been a bird that hit a high-tension wire here they don't think the was human caused. however it's something we're expecting to see a lot of in the coming months. flames were big, hot and spread quickly. officials say they're a good indicator of what is still to come >> we're going to see pone shally more showers, larger showers we've bee gun to see increase in the size of the wildfires that