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TEHRAN, IRAN - NOVEMBER 07: Locked gate at US embassy during the hostage crisis, in which 52 Americans were held hostages during 444 days from November 4, 1979 to January 20, 1981 by a group of Islamists students and militants in support of Iranian Revolution, on November 4, 1979 in Tehran, Iran. (Photo by Alain MINGAM/Gamma-Keystone via Getty Images)

TEHRAN, IRAN - NOVEMBER 07:  Locked gate at US embassy during the hostage crisis, in which 52 Americans were held hostages during 444 days  from November 4, 1979 to January 20, 1981 by a group of Islamists students and militants in support of Iranian Revolution, on November 4, 1979 in Tehran, Iran. (Photo by Alain MINGAM/Gamma-Keystone via Getty Images)