"Mousavi, prime minister for most of the 1980s, personally selected his point man for the Beirut terror campaign, Ali Akbar Mohtashemi-pur, and dispatched him to Damascus as Iran's ambassador, according to former CIA and military officials. The ambassador in turn hosted several meetings of the cell that would carry out the Beirut attacks, which were overheard by the National Security Agency." (thanks Olivia)
PS By the way, Mohtashemi is also supporting the "reform" movement now.