we're going to the u.s." >> kroft: and that was the jack barsky birth certificate. >> barsky: the jackicate that somebody had obtained and i was given. i didn't have to get this myself. >> kroft: did you feel strange walking around with this identity of a child? >> barsky: no. no. when you do this kind of work, some things, you don't think about. because if you explore, you may find something you don't like. >> kroft: the newly minted jack barsky landed in new york city in the fall of 1978, with a phony back story called a legend and a fake canadian passport that he quickly discarded. the kgb's plan for him was fairly straightforward. they wanted the 29-year-old east german to get a real u.s. passport with his new name, then become a businessman, then insert himself into the upper echelons of american society and then to get close to national security adviser zbigniew brzezinski so that he could spy on him. >> barsky: that was the plan. it failed. >> kroft: why? >> barsky: because i was not given very good instructions with regard to how to apply for a passport. >> kroft: when he went

>> ivan dmitri. >> reporter: how albert dietrich became jack barsky is one of the untold stories of thes 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 the fast track of becoming a chemistry professor, his dream job. >> it didn't work out because i was recruited by the kgb to do something a little more adventurous adventurous. >> steve kroft is with us. the story is unbelievable. the spy amongst us. [ laughter ] >> gayle, over here. >> hi, norah, high charlie. gayle, no us to meet you. >> welcome to cbs "this morning." >> she ice's like this everyday. >> it's early for steve kroft. this story is incr

we talked to the fbi people and jack barski and the fbi people that finally detained him and caught hime you don't know really because they're all classified. it's all classified. >> what's going to happen to him? >> he's never going to spend day in jail. he was finally detained by the fbi after he stopped working for the russians and basically by that time the berlin wall had stalin. he was sort of trapped here. there was nobody on the other side that was going to bring him back or cared about him. and so they just made a deal with him. he was going to help them and tell them as much as he knew about the kgb and the contacts and who he dealt with and they let him go and he's still consulting with the bureau. >> he sure seems to want to talk. i can't wait to see it. >> any story about spies is good. thank you. you can watch the full report on sunday. learn how they tracked him down and he how befriended an fbi agent. that's sunday night at 7:00 p.m. 6:00 p.m. central on cbs. >>> floyd mayweather is taking shots at many pacquiao after winning last weekend. he calls packquiao a sore loser