The Iranians released the hostages for 2 reasons, one as a sort of good will gesture to Reagan. The whole Warren Christopher thing was a stalling action by the Iranians to keep those men, and as long as stupid Christopher, much like Chamberlain, thought his supposed diplomacy was working, the Iranian's knew they could keep the hostages for the POLITICAL RELATIONS that the rest of the Islamic world could see that little Iran had made the BIG EVIL America come to a standstill, and do nothing. And two,because they knew Reagan would actually DO SOMETHING about the situation,unlike weak kneed Jimmy Carter who they knew was a pathetic, spineless pushover. If he wasn't they would have never been hostages taken in the first place, and again, if Carter showed any kind of spine for a conflict, the Iranians would have let them go much sooner. But, history has a way of bending around which side your on, and who's telling it!