>> michael meeropol: oh, absolutely. lutely convinced that we would find virtual proof. >> cooper: you were sure they were innocent? >> robert meeropol: as sure as one and one equals two. >> cooper: they formed a committee to re-examine the rosenberg case. ron radosh was among the first to sign up. at the time, he was an author and activist, highly sympathetic to the rosenbergs' cause and eager to help. >> radosh: by then, i had a ph.d. in history, and i believed my expertise as a historian enabled me to want to go through all these files that i expected would prove their innocence. >> cooper: but once ron radosh started going through the f.b.i. files, he realized he was wrong. julius rosenberg had been a soviet spy, and a zealous recruiter of others. >> radosh: i was stunned. it became readily apparent that this was not people who were arrested because they opposed the korean war or whatever, because they wanted peace. >> cooper: essentially... >> radosh: so... >> cooper: ...julius rosenberg's job was as a recruiter of o