A reconnaissance photo of a SAM site in North Vietnam. (Official USAF released by DoD Aug 16, 1965)

North Vietnamese SA-2 surface-to-air missiles, most often arranged in groups of six, sit on launchers near their radar guidance system housed in a van among a cluster of trucks and huts (upper right). This facility—discovered by an Air Force photo reconnaissance plane—was typical of the SAM sites that Operation Spring High was targeting on July 27, 1965, when disaster struck. (U.S. Air Force)

U.S. Air Force