On November 4, 1979, the U.S. embassy was overrun by student protesters following the Iranian Revolution. 63 hostages were taken at the embassy, while Laingen and two others were seized at the Iranian Foreign Ministry Office. Mrs. Laingen tied a yellow ribbon about the oak at their home during the crisis. Laingen and 51 hostages were released on January 20, 1981, following 444 days of captivity. Laingen remains the last American head of mission to Iran, as direct bilateral diplomatic relations between the two governments were severed following the seizure of the embassy and have not been restored since.