here's a preview of steve kroft's report. so who are you? >> who am i?ed. right now i'm jack barski. i work in the united states i'm a u.s. citizen. but it wasn't always the case. >> how many different identities do you have? >> i have two main identities, a german one and an american one. >> what's your real name? >> my real name is jack barsky. >> what name were you born with? >> ivan dmitri. >> reporter: how albert dietrich became jack barsky is one of the untold stories of the cold war. an era when the real battles were often fought between the cia and the kgb. barsky was a rarity a soviet spy who posed as an american and became enmeshed in american society. for the ten years he was operational for the kgb, no one in this country knew his real story -- not even his family. did you think you were going to get away with this? >> yeah otherwise i wouldn't have done it. [ laughter ] >> reporter: what barsky did can be traced being to east germany, back to the days when he was albrecht dietrich. a national scholar at a renown university dietrich was on th

work out that way because i was recruit bed the kgb to do something a little more adventurous. >> steve kroft unbelievable. >> norah, gayle. nice to meet you. >> it's early for steve. >> i mean how -- this story's incredible. how did you find him? >> i can't really say that. i don't want to say that. >> yeah. but we found out -- we knew that -- we had some people in germany that told us about it. >> i like how you asked him, steve, to say his name slowly. when he said it the first time i thought it was interesting. were you surprised how he was able to fool people? >> he's a very smart guy. >> clearly. >> by the time they finished training him he spoke incredibly good english. not really. the thing that's really interesting about it is ghav him $6,000. >> he ended up with $6,000 and a birth certificate and that's it. no social security number that's it. they wanted him to infiltrate the security and get close to jimmy carter's national security adviser. >> why is he coming forward now? >> i think that he -- you know he's getting on in years. i think that he wants to sort of resolve -- he has

busiest bridge in the western hemisphere for train traffic, period. >> kroft: and what kind of shape is it in? >> boardman: it's safe, steve not reliable. and it's getting less reliable. it's old. its systems are breaking down. there's an inability to make it work on... on a regular, reliable basis. >> kroft: boardman says the portal bridge is based on a design from the 1840s, and was already obsolete shortly after it was completed in 1910. it's a swing bridge that needs to be opened several times a week so barges can pass up and down the river. it takes about a half an hour. the problem is it fails to lock back into place on a regular basis. and what kind of problems does that cause? >> boardman: it causes trains to stack up on both sides. and actually, when a train stacks up here, it can stack up all the way down to washington and all the way back up to boston. this is a single point of failure. that's one of the biggest worries we have on this corridor is these single points of failure. >> kroft: amtrak's president says the bridge has to be replaced. the design work has already been completed, and the project which woul

i'm steve kroft. we'll be back next week with another edition of "60 minutes."h "cbs this morning." >> to listen to "60 minutes" and subscribe to our podcast, go to play.it, the podcast network. hear some of your favorite "60 minutes" stories. that's where at&t can help. we monitor network traffic worldwide, so we can see things others can't. mitigating risks across your business. leaving you free to focus on what matters most. advanced design makes it easy to protect your dog or cat from fleas and ticks. discover seresto. with the performance you expect from topicals in a non-greasy collar seresto provides protection against fleas and ticks for 8 months. seresto. at subway, a great meal starts with a great sandwich on the new "simple 6 menu." with six of our best six-inch subs, like the tender turkey breast plus any bag of chips and a 21-ounce drink for just $6 every day. captioning funded by cbs and ford captioned by media access group at wgbh access.wgbh.org ♪ ♪ i'm here to save your life. what life? letters from your kids. when they're old enough to write 'e

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in 2013 "60 minutes" correspondent steve kroft spoke to wing suit enthusiasts about the sport. >> dot when you're at the top of the mountain and shake hands? do you think about it? >> yeah but we don't think, i might not see you again, say good-bye give me a kiss. >> that never enters your mind. >> come on. when you do crash when you're in your wing suit. you're going to die. nobody lives through that. you're just going too fast. >> reporter: potter was pushed the limits of an already extreme lifestyle navigating rocks and suspensions. >> they're known as experts. these two men were luminaires in this community. >> last year potter's friend and climbing partner was killed in a similar accident in the national park in utah. >> i don't understand this. you crash into the mountain as you're coming down? >> if your parachute does not deploy, yes. >> they don't know what happened there. they were doing it at night. you're not supposed to do it at all. >> your parachute is supposed to open if something goes wrong. >> or to land. >> terrible story. >>> there was this multiple murder in wash