. >> talking is 34 mario dobovisek. every two weeks, he shows a visitor is a round here.as incarcerated here for three months. it was the worst time of his life. in the mid-1980s, as a homosexual with contacts to the west, he attracted the stasi's attention. he rejected attempts to recruit himself as an informant. his prison gunshot, now part of the door, dates back to a failed attempt to escape to west germany. he ended up in this isolation cell, deprived of sleep and interrogated for days on end. the experience still haunts him. >> from 6:00 a.m. until 10:00 p.m., you cannot sit or lie down. >> the stasi interrogators knew intimate details of his life. he could not believe it was possible. >> it bothered me for years after the time in prison. until i looked at the files in 1997 and found out that it was good friends, not necessarily as informants but as suspects during interrogation, who never told me later that they had been interrogated. but there were also four informants would come names, colleagues, my boss, and also a good friend. that really shocked me. >> the re