TEHRAN, IRAN - JUNE 1980: A group of hostage holders putting fire on the Amercian flag on the roof of the occupied U.S. embassy during the U.S. hostage crisis which was a diplomatic crisis between Iran and the United States where 52 U.S. diplomats were held hostage for 444 days from November 4, 1979 to January 20, 1981, after a group of Islamist students took over the American embassy in support of the Iranian revolution. (Photo by Reza/Reportage by Getty Images)