A U.S. Air Force Douglas A-1H <i>Skyraider</i> (s/n 52-139608, "Blood, Sweat &amp; Tears") from the 1st Special Operations Squadron, 56th Special Operations Wing in flight. This aircraft was among the last used by the USAF until November 1972 from Nakhon Phamom Air Base, Thailand. The aircraft was later transferred to the South Vietnamese Air Force.
U.S. Air Force
U.S. Air Force photo in: Dana Bell: <i>Air War over Vietnam, Volume III.</i> Warbirds Illustrated No. 21. Arms &amp; Armour Press, London (UK), 1983, cover. <a href="//commons.wikimedia.org/wiki/Special:BookSources/0853686076" title="Special:BookSources/0853686076">ISBN 0853686076</a>.