this is "nightline." tonight face app flap. are aging faces a privacy risk? the famous, your friends and family. maybe even you are giving the viral app a try. but some are concerned about the potential implications in light of cyber security worries. plus, man on the moon. >> that's one small step for man. one giant leap for man kind. >> the amazing steps it took to make that giant leap. the crucial calls from mission control. the life and death decisions, 238,000 miles from earth. and making new memories. the star-studded cast of cats, ready for their closeups in this

feline frenzy musical. but first, the "nightline" five. number ♪ ♪ ♪ ♪ ♪ ♪

♪ ♪ honey, this gis ridiculously fast. we are seriously keeping up with the joneses. keeping up with the ford's. keeping up with the garcia's. the romeros. patels. the wahh-the-wahh wolanske's. right. no one is going to have internet like this. xfinity makes keeping up with the joneses simple. easy. awesome. want gig-speed internet? we've got you covered. or check out our other amazing speed options. get started now for as low as $29.99 a month for 12 months. click, call or visit a store today. good evening. thanks for joining us. it's the viral app that lets you take a sneak peek at your potential future self. privacy

and worry that when it comes to man epila manipulated photos and videos it's hard to tell what's fact and what's fiction. here's kyra phillips. >> reporter: despite what we say about not wanting to see ourselves age, we apparently do, and thanks to a crystal ball on our phones we can, even in hollywood where youth is an obsession, celebrities are getting in on the social media action, from the jonas brothers to carrie underwood, to in synch. it's all part of the latest craze to hit social media. it's called face app. the app, which was developed in 2017, uses a type of artificial intelligence to transform your face. with just one tap. want a beautiful smile? done. want a preview of what you might look like in 50 years? bingo. it's that age filter that's led to the recent explosion in popularity, making it the top free app in the iphone app

store, but in the wake of recent social media scandals where other platforms have been taken to task for giving away users' private information many are now wondering if face app is a potential risk. its rise in popularity is now raising privacy concerns. >> when you start using face app you agree to a pretty harsh terms of service which says that any photo that you use in face app, technically owns it and has the ability to use for anything it wants. >> reporter: according to its privacy policy, face app cannot ensure the security of any information you transmit to face app or guarantee that information on the service may not be accessed, disclosed, altered or destroyed. but to ease concerns, in a recent statement at tech crunch, the company claims that it doesn't sell or share any user data with any third parties, and that even though the core team is based in russia, the user

data is not transferred to russia. it also says most photos that users upload are erased within 48 hours. despite that, though, just the mention of the app being created in russia has thrown some people into panic. yesterday the democratic national committee, perhaps recalling russian interference in the 2016 election septembnt this warning. face app was developed by russians. we recommend that campaign staff and people in the democratic ecosystem should not use this app. >> the russian connection with face app, it's kind of a bully man. there's no indication face app is cooperating with the russian government, giving data over to them or anything like that. so that's kind of something that has become a scare tactic more than it's based in rea. >> reporter: while facial editing on things like face app might be fun and games, many people worry that other

advancements in technology could result in unwanted and potentially harm itfful results. >> the worry is it turning into something that can be used as ammo for a deep fake. this technology is getting better every day. >> reporter: last year we studied deep fake videos. what are you about to see is an example of just how convincing this technology can be. >> we're entering an era in which our enemies can make it look like anyone is saying anything at any point in time. >> reporter: this looks like president obama and sounds like him, too. >> kell monger was right. or ben carson is in the sunken place. >> reporter: but it isn't. >> see, i would never say these things. at least not in a public address, but, someone else would. someone like jordan peele, moving forward, we need to be more vigilant. >> reporter: in this case, buzz

feed and jordan peele used the technology to create an eye-grabbing psa, but experts fear that in the wrong hands deep fakes could become the next frontier in fake news and spark very real consequences. what could be so dangerous about a deep fake? >> we're used to looking at an image or video and putting faith in it, and with the rise of being able to manipulate that, our faith is going to be in jeopardy. >> reporter: it created deep concern in 2017 when reddit users started posting fake pornographic videos online, largely targeting actresses like gal gadot, super imposing her face without consent. as the technology continues to evolve, some people worry they could become intis ding wishable from the real deal.

potentially triggering widespread panic, riots or even war. those threats grabbed the attention of lawmakers. >> deep fakes is a new area, and we know people will continue to find new ones. >> reporter: and the department of defense. >> i think a lot of times there are some indicateders that you can see, but it's going to get more and more challenging over time, that's why we developed the media forensics program. >> reporter: is this an arms sflaes. >> there's certainly a bit of a cat and mouse game going on. >> reporter: he heads darpa. his task. developing algorithms that can spot the fake even when the eye can't. >> do you think that that was manipulated? >> reporter: no. >> in this case the video was actually manipulated. you'll see the real video on the right-hand side. the car that moved through the scene was essentially erased out

of the individuvideo. >> reporter: while the technology isn't flawless, there are pretty convincing spoofs out there, from nic cage in the sound of music. ♪ the hills are alive with the sound of music ♪ >> reporter: or the "godfather." even the "avengers". but the creators of videos like these are aware of the controversy. we reached out to the person behind derpfakes. they claim to be one of the early deep fake innovators. they didn't want to reveal their name but told abc that all deep fakes have a level of controversy attached to them. they add from our perspective, the best approach is to make the public familiar with the idea that what we see is not true by default. either way, it's here to stay. what have you witnessed so far that's worrisome to you? >> manipulations that may have

required state-level resources or several people and significant financial effort can now potentially be done at home by an individual. >> reporter: so you're saying it's become easy, and it's cheap to create a deep fake. >> it is significantly easier than it has been in the past. >> you'll always be with me. >> reporter: the creation of a deep fake is somewhat similar to the state of the art special effects used in today's film making, like the face mapping used to add the late paul walker's likeness to the movie ""furious 7"". but deep fakes also have a lot in common with technology you're probably more familiar with. the photo album on your phone that learns your friends' faces or face swapping on snapchat. >> there's jackie. and there's me with jackie's face. >> so, if you compare a deep fake to what a person can do with snapchat on their phone, deep fakes are much more believable. >> reporter: let's see the super

computer. >> i can tell the train on that data, take those models and create deep fakes. >> reporter: at the university of colorado, denver, it's jeff smith's job to create convincing deep fakes as one of darpa's partners. >> we are manipulators. we act at bad guys, creating manipulated audio, video and imagery so that the algorithms that are being developed under the program can be tested and overall the ability for the detection of manipulated media gets better. >> reporter: and, as that happens, jeff hopes his students can stay ahead of the curve. >> i just want to help develop the software they're trying to develop to detect this kind of fake media so people hopefully aren't tricked by videos that you request easily make, which is the software we have. >> reporter: is the mantra here don't always believe what you see? >> exactly. >> reporter: and while seeing may not necessarily be believing in the digital age, looking

beyond face value may be more important than ever. for "nightline," i'm kyra phillips, in denver, would could. >> just to be clear, there has been no link between face app and a deep fake. up next, it's showtime at apollo 11. ...this... man 1: ...this is my body of proof. man 2: proof of less joint pain... woman 3: ...and clearer skin. man 3: proof that i can fight psoriatic arthritis... woman 4: ...with humira. woman 5: humira targets and blocks a specific source of inflammation that contributes to both joint and skin symptoms. it's proven to help relieve pain, stop further irreversible joint damage, and clear skin in many adults. humira is the number one prescribed biologic for psoriatic arthritis. (avo): humira can lower your ability to fight infections. serious and sometimes fatal infections, including tuberculosis, and cancers, including lymphoma, have happened, as have blood, liver, and nervous system problems,

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. you know, it's been 50 years since three astronauts crammed into a narrow saturn five rocket

and catapulted into space. that historic flight landing map on the moon for the first time and capturing the country's imagination. here's david kerley, with a look at that land mark mission. >> reporter: it was a moment that mesmerized the entire world. 50 years ago, millions crowded around televisions, any television they could find, collectively holding their breath. would man walk on the moon? >> the eagle has landed. >> reporter: black and white images, revealing what one of the astronauts called magnificent desolation. >> that's one small step for man. >> reporter: that single step of victory for the u.s. >> ungiaone giant leap for man . >> reporter: the mission was not so much about exploration as it was about a space race against the soviets. >> now it is time to take longer

strides. time for this nation to take a clearly leading role in faith achievement. >> reporter: it was an ambitious goal to put a man on the moon in fewer than eight years. astronauts were put through intense training. >> the training has been focussed on how to do the job and how to do it best. >> reporter: the three apollo 11 crew members achieved celebrity status. >> liftoff. >> reporter: for neil armstrong, buzzal drink and michael collins, the journey started on the biggest rocket ever made. >> lifting up, we have power clear. we have power clear. >> reporter: michael collins was the junior member of the screw, the command module pilot. you were knocked back and forth with spastic little motions. that went on four five, six seconds, and then you were clear, and we all went whoo,

that's over. >> reporter: aldrin in awe of his view from the capsule. the next day they were orbiting the moon. armstrong and aldrin loaded onto the lunar module, beginning the attempt to be the first humans to land on the moon. >> houston, you're looking good for separating. >> reporter: it did not go smoothly. >> 12:02. >> 1202 alarm. >> reporter: first alarm showing that the computer was overloading. >> houston, you're a go for landing, over? >> reporter: then unexpected boulders in the landing field. armstrong has to take over control manually. >> 30 seconds. 30 feet down, two and a half. picking up some dust. two and a half houston, the eagle has landed. >> reporter: it was an epic

moment, borne out of cold war rivalry. >> they said i wanted to win this space race. >> reporter: gene krantz is back in a fully-restored mission control hugh son. >> you can remember the calls that cap con made. >> reporter: it was krantz who made the call to land and then whether to stay. >> all flight controllers. >> go. go. >> go for landing. >> reporter: neil armstrong given the okay to make his way onto the moon's surface. >> i'm going to step off the land now. that's one small step f giap for man kind. >> reporter: armstrong and a bit later aldrin moved around the moon fathering

samples. >> try on a new play tex at your favorite store. >> reporter: the consumer products company playtex built the suits. >> they made girdles and gloves. >> reporter: expandible fabrics. >> the basic fabric of a spacesuit was there in playtex. they had the technology. >> reporter: ioc dover, a division of playtex won the contract with the help of this film showing what their suit could do, 21 layers of material, painstakingly sewn together. the moonwalk was their first full system check. >> beautiful, beautiful. there's a stark beauty all its open, much like the high desert of the united states. it's different, but it's very pretty out here. >> reporter: so while million tmillions watched in awe. >> here men from the planet

earth first set foot upon the moon. >> reporter: and sonny ream, worried something might fail. when buzz aldrin is talking about kangaroo hops, what are you thinking? >> we're successful. we can declare a success. i don't care how many craters buzz wants to look at, get him back inside. >> reporter: with their samples, the astronauts return to the lamb and then rely on one ascent rocket engine to return back to lunar orbit. okay, doc, open the hatch, did you get a sense of what the moon smelled like? >> no smell. but i thought god they're cruddy. from the waist down they were moon dust. >> reporter: they returned heroes. the president greeting them before a worldwide tour. the world shared in the glory. >> it really demonstrated the power of free and open society. >> reporter: the country learned

what is possible with determination and resources. i'm david kerley for "nightline," in washington. >> and national geographic's apollo missions to the moon is available now on demand and on nat geotv.com. up next, the cat is out of the bag. this iconic broadway musical living its second life on the silver screen. (avo) do you push through migraine? imagine what you can do with more migraine-free days. (pirate) arr! (jessica) en garde! (avo) when you're not fighting through migraine, imagine the possibilities. once-monthly emgality is used for the prevention of migraine in adults. it can help give you more migraine-free days. with emgality, about 60% of people had their migraine days cut in half or more. don't use if allergic to emgality. allergic reactions, like itching, rash, hives, and trouble breathing can occur even days after use.

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. and finally tonight, the epic tale for the ages. one of broadway's longest-running musicals, "ca as "cats"is making its iconic debut, and in this behind the scenes look, a-listers from all corners of the entertainment industry lending their prowess, from taylor swift to jennifer hudson. ♪ it's so easy to leave me ♪ all alone with the memories ♪ of my days in the sun >> cue the cat calls. that's "nightline." you can always catch our full

episodes on hulu. goodnight, america.