The first U.S. Air Force plane is lost in South Vietnam. The C-123 aircraft crashed while spraying defoliant on a Viet Cong ambush site.
The aircraft was part of Operation Ranch Hand, a technological area-denial technique designed to expose the roads and trails used by the Viet Cong. U.S. personnel dumped an estimated 19 million gallons of defoliating herbicides over 10-20 percent of Vietnam and parts of Laos from 1962 to 1971. Agent Orange—so named from the color of its metal containers—was the most frequently used.