this is "nightline." >> tonight, how far would you go? >> thank you. >> for the perfect profile pic. >> i feel like i still look like myself but photoshopped. >> you can choose a filter. >> ready to rock and roll. >> or -- >> i'm going to be a supermodel! >> take it to the extreme with selfie surgery. >> botox is a necessity. >> plus -- don't try this at home. we take you inside the wheel well of a jumbo jet to see what it was really like for the 15-year-old who flew five hours from california to hawaii and lived to tell the tale. and the desperate stowaway willing to risk it all. and bigger, better? >> i think it's safe to say that you guys and 36,000 other people

and a million spectators took the marathon back. >> i think we took it back. >> but first, the "nightline" top five, which starts right now.

hey! have you ever tried honey nut cheerios? love 'em. neat! now you on the other hand... you need some help. why? look atchya. what is that? you mean my honey wand? [ shouting ] [ splat ] come on. matter of fact. [ rustling ] shirt. shoes. shades. ah! wow! now that voice... my voice? [ auto-tuned ] what's wrong with my voice? yeah man, bee got swag! be happy! be healthy! that's gotta go too. ♪ hey! must be the honey! [ sparkle ] sweet. good evening and thanks for joining us. imagine changing your entire selfie image with the click of a

button. want to look slimmer, prettier, even younger? 90% of teens today say they've posted selfies online, where perfection is just a filter away. but some are taking the quest to even bigger extremes, striving to look airbrushed in real life. here's abc's cecilia vega. >> reporter: this is how americans are spending their time. taking pictures of themselves all day every day. and like millions of people, triana levy -- >> thank you. >> reporter: -- loves taking selfies. >> we took selfies outside, and they're super cute. >> reporter: but she doesn't always love the results. >> i'm feeling like i look a little pale in these pictures. >> reporter: so to get the perfect picture she just uses an iphone app. >> filter i like to use is actually just natural. it's a really subtle difference, and it just kind of smooths out your face. >> i love to try on new looks. >> reporter: the perfect 365 app lets you airbrush your selfie.

>> one tap to try hot new styles. >> reporter: and become an instant cover girl. the art of the selfie has created a whole industry of smartphone apps to help you look your best. think you look too fat? try skinny pics. dull skin or blemishes, face tune can clear that right up. and what if you just plain hate the photo came out? like these cats in a pixter ad, don't worry, it can all be fixed. >> your social media presence is just as important as your real life presence. >> reporter: triana hated the way she looked online so, she decided to take her selfie makeover a step further, opting for plastic surgery. >> i'm going to be a supermodel! >> reporter: specifically, a nose job and a chin implant. with the help of this beverly hills doctor, richard ellenbogen. >> i don't want to make the nose too small but do i want to make it straightened. >> at what point are you going to be well enough to post these

new pictures on facebook? >> as soon as dr. ellenbogen tells me i'm camera ready. >> reporter: we first met triana two years ago in los angeles. >> i want to talk to you about this project. >> reporter: it was hard to see the flaws nagging at her but she told us she didn't like the face staring back at her during skype chats. >> okay. thanks. take care. i'll talk to you soon. >> reporter: or in facebook pictures. >> ten years ago i don't think i even noticed that i had a weak chin. >> reporter: she tried to change the camera angle, even untagged photos she didn't like. but none of it was enough. >> my darn chin just bugs the living daylights out of me in this photo. >> kind of the first thing that i look for in a photo is how does my chin look, which is really weird. >> reporter: so she decided to get a chin implant. >> when you do a chin, sometimes you have to do a little bit more than that to balance the face and the chin. >> reporter: but it didn't stop there. dr. ellenbogen recommended triana get additional procedures like fat grafting and a nose job, up to sa worth of surgery.

though triana is a family friend of dr. ellenbogen so she got a discount. >> sounds like you're going to an extreme to -- >> you think it's extreme? >> people might say surgery, it's a huge commitment. >> to me plastic surgery should be a last-ditch effort. after you've worked out. after you've had good discipline in your diet and exercise. then you go to surgery. >> oh, wow. >> reporter: we were there the day of triana's surgery. >> i'm getting very excited. starting to border on nervous. so i'm ready to get going. >> okay. ready to rock and roll. this is going to be her cheekbone. this is her chin implant. it curves around the side a little bit. it's a rounded one that's very soft. it's not pointed for her face. >> reporter: it took two hours for all the nips and tucks. >> you look good. very good. very nice.

>> you happy with everything? >> i'm thrilled. >> reporter: a week later she was bruised but pleased. >> still a little bit swollen. but just perfect. >> reporter: a month after her surgery she was thrilled. >> hello. >> hi. >> hi, cecilia. >> hey, triana. >> welcome. >> wow. oh, my gosh. you look different. >> reporter: after all that surgery her new face was complete. >> here is the quintessential profile shot. which before you never would have put on. >> i never would have put that on because my little chin would have been looking like a little turtle. >> reporter: it may seem extreme. but for triana all of this wasn't just an ego boost. taking a good selfie has become a high-stakes business that can turn just about anyone into an instalebrity. >> today this business, moving at the speed of the internet, your selfie is your head shot. so you can reinvent yourself every single day with simply your iphone. >> reporter: as a senior talent

manager at the youfluencer group she manages the careers of rising internet stars like nicole guerrero, online makeup guru. >> their social media presence and their use of selfies on instagram is a huge marketing tool that they have at their fingertips. >> reporter: there are companies devoted to finding the next big star online. and the ad dollars they can bring in. hoping they can pick out the next jen selter, who became famous for her provocative posterior selfies. today triana is still happy. >> i now have the face that i've always thought that i had. i feel like i still look like myself but photoshopped. >> reporter: but in a quest for the picture perfect face she is not done with medical enhancements. >> since the last time you've seen me i actually had to have corrective -- very small corrective surgery on my nose, and i had a little but the more fat grafting. and botox is to me a necessity.

it's kind of like in my bills, like rent, food, gasoline, medical insurance, botox. it's like a standard. >> reporter: ironically, triana feels selfie-enhancing apps actually can make people insecure about the way they look in real life. >> it skews our perception of how we should look. i think it is making ourselves hold ourselves to a much higher unrealistic standard. >> reporter: but triana believes there is nothing wrong with trying to look her best. >> not everybody is born beautiful. and if you can get a little help from an app or from a nip/tuck or from an instagram filter, then more power to you. >> reporter: for "nightline" i'm cecilia vega in los angeles. >> up next, hiding in the bathroom or climbing into a box? stowaways invent all kinds of creative ways to fly without a plane ticket. but may still pay a price. [ terri ] my antidepressant worked hard to help with my depression.

but sometimes, i still struggled to get going, even get through the day. so i was honest with my doctor. i told him i'd been feeling stuck for a long time. he said that for some people, an antidepressant alone only helps so much and suggested we add abilify (aripiprazole). he said that by taking both, some people had symptom improvement as early as 1 to 2 weeks. i wish i'd talked to my doctor sooner. [ female announcer ] abilify is not for everyone. call your doctor if your depression worsens or you have unusual changes in behavior, or thoughts of suicide. antidepressants can increase these in children, teens and young adults. elderly dementia patients taking abilify have an increased risk of death or stroke. call your doctor if you have high fever, stiff muscles and confusion to address a possible life-threatening condition. or if you have uncontrollable muscle movements, as these could become permanent. high blood sugar has been reported with abilify and medicines like it and in extreme cases can lead to coma or death. other risks include increased cholesterol, weight gain, decreases in white blood cells, which can be serious, dizziness on standing, seizures, trouble swallowing and impaired judgment or motor skills.

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it's a journey that has authorities baffled. exactly how did a 15-year-old kid manage to evade security in a busy american airport and hitch a ride on the wheels of a jumbo jet over the weekend? chances of survival are so slim. and yet he's not the only stowaway who's made headlines. so we decided to take you inside the wheel well of a jetliner to see just how miraculous his story of survival truly is. boarding a plane is one of modern life's more undignified

ordeals. the security line. the pat-downs. and those bothersome baggies. if only we could somehow skip it all. well, we might fantasize. others have given it a try. most recently yesterday, when a 15-year-old boy breached the security fence at san jose international airport and apparently climbed into the wheel well of a hawaiian airlines flight to maui. experts say he was lucky to survive. but he's not the first. there was b.j.avril. >> in the end it did come down to brains. >> reporter: before using his smarts to win the amazing race, he made a really stupid decision. in 1999 this scrawny harvard sophomore arrived too late to board a flight home. so he jumped a boarding line at boston's airport, hiding in the plane's tiny bathroom. >> i wasn't going to stay there the whole time. i was going to wait until it took off. >> reporter: but avril's plan hit a snag. just before takeoff other passengers tipped off a flight attendant. then there's the case of charles

mckinley. >> i was nervous, scared, and i was coughing. >> reporter: instead of buying an airline ticket the former shipping clerk brazenly boxed himself in a crate and shipped himself home on the company's dime. passing through tsa security not once but twice. >> is this the size that he fit into? >> no. >> reporter: my abc crew is about to give me a lesson in flying cargo class. >> that's the crate? >> reporter: in a small pine box like this one. >> the things i do for my job. all right. let's give it a shot. you really have to -- >> do you mind if i put the lid on? >> i guess not. why do i feel like i'm going to regret that decision? kind of sticking out. >> yes, it is. >> i'm going to cry. >> are you ready to come out? >> that is deeply claustrophobic and creepy.

>> reporter: aviation consultant jay joseph believes mckinley cheated death. >> if you're stowing away in a crate, you're gambling with your life. >> you really are on your own. >> reporter: according to an faa study on stowaways, yes, it happens often enough to keep statistics. 76% of stowaway passengers have died in transit. but believe it or not, what's more common -- sneaking into the wheel well, like that 15-year-old california teen did yesterday. it usually doesn't end well. >> we've come across what looks like a dead body. >> reporter: the overwhelming majority of stowaway cases involve people from developing countries fleeing desperate situations to make their way to europe or north america. >> the man whose body was found in a street in west london has been identified. >> reporter: with no heat, no oxygen, and no pressurization, it's often a one-way ticket to the afterlife. like this horrifying image of a 14-year-old stowaway caught unwittingly on camera falling

out of a plane taking off from australia. >> when the wheels come down, you're falling out. >> reporter: at 18,000 feet aviation experts say hypoxia or oxygen deprivation sets in. >> best case scenario someone's going to become light-headed. >> reporter: at 22,000 feet with no pressurization the lungs have trouble functioning. it's tough to maintain consciousness. >> you're going to have a loss of faculties, thought processes. >> reporter: and at 35,000 feet hypothermia would set in as the temperature can drop as low as minus 81 degrees fahrenheit. >> certainly this would be the only location that somebody could position themselves such that they would not be crushed bit landing gear during the retraction -- >> just right here. >> that's right. >> have you ever flown before? >> no. never been on an airplane before. i couldn't even get on a roller coaster. >> reporter: but somehow jeanette washington's 16-year-old he son davonte tisdale ended up in in the wheel well of a us airways flight from charlotte bound for boston.

>> what did they tell you? >> they had found his body in boston, massachusetts and there was something about a plane. >> he literally came crashing down into a street in a suburb of boston. his body was in such bad shape the only way his dad could identify his body was because of waves in his hair. >> reporter: investigators in massachusetts discover a palm print in the left wheel of a us airways plane. his clothing shows signs of airplane grease. and his body was found in the direct flight of the plane's path. security cameras never spot delvonte inside the airport. but outside, just yards away from where that us airways plane took off, there was this glaring breach of airport security. >> and this is -- >> literally our weakest link. we sent investigators down. they said you know, there's a hole in the fence. security was awful. >> reporter: but what if delvonte was a different kind of stowaway? >> what if he was a terrorist? what if he had a bomb? >> literally, it's a 100-yard dash from here to that runway.

>> reporter: in january i went down to charlotte, the ninth busiest airport in this country, to see what, if anything, had changed. >> this razor wire on top is new evidently. >> that's my understanding. that's correct. >> reporter: but if someone were determined to penetrate this fence in charlotte, the experts we talked to believe there would be plenty of time to do it. >> we've been out on the perimeter fence for about 45 minutes. finally somebody from the airport authority came by. >> in some airports you'd be arrested within minutes. >> reporter: so this is part of the faa regulations, keeping the perimeter secure. >> yes. >> reporter: even more alarming, keating says only 17% of the nation's airport perimeters have been assessed by homeland security in the past year. >> in so many places in this country you can look out the window, look at the perimeter, and say this doesn't make any sense. >> reporter: still, a grieving mother can't help but wonder why her son made such a tragic decision, stowing away in an airplane. >> it's hard.

it's hard to think about what could have been. all i know is he's gone way too early. >> reporter: though many questions remain, another set of parents tonight are counting their blessings. their son given a second chance. >> and next up, 36,000 marathoners, a million spectators, and a whole lot of hometown heroism at the boston marathon today. where you've learned youa thing or two. age this is the age of knowing what you're made of. so why let erectile dysfunction get in your way? talk to your doctor about viagra. 20 million men already have. ask your doctor if your heart is healthy enough for sex. do not take viagra if you take nitrates for chest pain; it may cause an unsafe drop in blood pressure. side effects include headache, flushing, upset stomach, and abnormal vision.

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one year after the boston marathon fell victim to terrorism, the city was in the spotlight again. but this time as a symbol of resilience, showing what it means to be boston strong. my nightline co-anchor dan harris is there. >> what a rush to watch 36,000 smiling people. 9,000 more than last year. pour over the starting line. secure in the knowledge that there were 4,000 cops out there with dogs checking bags, riding in choppers, and generally making sure this was the safest

place on earth today. >> today is the day you're going to be okay. >> reporter: joe and natalie stavis were raring to go. they're a father-daughter team, both doctors. and last year they were about to finish when the bombs went off. they stopped running and started helping people. >> why is it so important to you to run again this year? >> we just didn't finish what we set out to do. >> reporter: today some of the survivors bravely returned to the finish line, including jeff bauman, from this iconic shot in those horrible moments after he lost his legs and was rescued by a stranger in a cowboy hat. there he was today, pounding fists with his rescuer and now friend, carlos arredondo. heather abbott, who lost her lower left leg, was here too. she put on a prosthetic blade and ran the last half mile alongside a woman who helped save her life that day. and then there was celeste corcoran, who lost both legs while waiting to see her sister cross the finish line. after an agonizing year during

which we saw her comforted by a marine double amputee -- >> you're going to be more independent, you know, than you ever were. >> reporter: -- she was back today, not only to witness her sister finish but to finish right alongside her. >> i just had to see her cross. >> reporter: it's worth noting heroism came in many forms today. >> boston strong! way to go! >> reporter: there were an estimated 1 million spectators, double the average, including this guy, who we watched cheering runners nonstop for hours. >> thank you. great job. great job, runners! way to go, guys! you did it! you did it! way to go! >> reporter: as for natalie and joe stavis -- >> congratulations. >> reporter: -- they finally completed some personal business, crossing that finish line they never crossed last year. >> i think it's safe to say that you guys and 36,000 other people and a million speck taitators t the marathon back. >> i think we took it back. i think so.

>> there were a lot of people supporting us and a lot of people that brought memories from the past and i think were able to close that chapter, and we're moving on. >> reporter: couldn't agree more. all in all, a great day in my hometown. for "nightline" this is dan harris in boston. >> and thanks for watching abc news. "world news now" is coming up soon with overnight breaking news. and tune in to "good morning america" tomorrow. and as always, we're online at abcnews.com. good night, america. every day more america