John Gordon Mein

John Gordon Mein (September 10, 1913 – August 28, 1968) was the first United States ambassador to be assassinated while serving in office.

Mein served as the United States Ambassador to Guatemala (1965–68) during the Guatemalan Civil War. He was shot by rebels belonging to the Fuerzas Armadas Rebeldes (FAR; "Rebel Armed Forces") one block from the US consulate on Avenida Reforma in Guatemala City on August 28, 1968. US officials believed that FAR intended to kidnap him in order to negotiate an exchange, but instead they shot him when he attempted to escape.