During the Iran hostage crisis

The Iran hostage crisis began on November 4, 1979, when 66 Americans, including diplomats and other civilian personnel, were taken hostage at the Embassy of the United States in Tehran, with 52 of them being held until January 20, 1981. The incident occurred after the Muslim Student Followers of the Imam's Line stormed and occupied the building in the months following the Iranian Revolution. With support from Ruhollah Khomeini, who had led the Iranian Revolution and would eventually establish the present-day Islamic Republic of Iran, the hostage-takers demanded that the United States extradite Iranian king Mohammad Reza Pahlavi, who had been granted asylum by the Carter administration for cancer treatment. Notable among the assailants were Hossein Dehghan, Mohammad Ali Jafari, and Mohammad Bagheri. The hostage crisis contributed to a dramatic decline in Iran–United States relations. After 444 days, it came to an end with the signing of the Algiers Accords between the Iranian and American governments; Iran's king had died in Cairo, Egypt, on July 27, 1980.