Forty years of US-Iran relations

Key dates between the US and Iran since 1979 after their exchange Monday in which the US designated Tehran's elite military force a terrorist organization and Iran called the US a "state sponsor of terrorism".On November 4, 1979 radical students demanding the extradition of Shah Mohammad Reza Pahlavi take 52 diplomats and employees of the American embassy in Tehran hostage, seven months after the establishment of the Islamic Republic.The hostages are held for 444 days in a crisis that results in