An Iranian visitor passes in front of a mannequin depicting one of the 52 U.S. diplomats held hostage for 444 days at the 13 Aban exhibition in the old U.S Embassy in Tehran, Iran on March 5, 2008. From November 4, 1979 to January 20, 1981 a group of militants took over the American embassy in support of Iran's revolution and held diplomats hostage. (UPI Photo/Mohammad Kheirkhah)