The former head of Israel‘s intelligence service believes the Iranian regime is a rational one and even its president, Mahmoud Ahmadinejad – who has called for Israel to be annihilated – acts in a somewhat rational way when it comes to Iran‘s nuclear ambitions. While the possibility of a nuclear-armed Iran becomes an election year issue, ex-Mossad Chief Meir Dagan sits down with Lesley Stahl to discuss the Iranian nuclear program and stress that now is not the time to attack it. The 60 Minutes interview will be broadcast Sunday, March 11 at 7 p.m. ET/PT.