A U.S. Air Force Cessna O-1F <i>Bird Dog</i> (s/n 57-2977) taking off at Bao (Loc?), South Vietnam. This aircraft was also used by the Air America as "Raven" aircraft (unregistered forward air control aircraft uses in Laos). It was later sold to the Royal Thai Air Force as "O-72977".
USAF
<a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/photos/index.asp">National Museum of the U.S. Air Force</a> photo <a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/shared/media/photodb/photos/2014%5C01%5C140113-F-DW547-026.jpg">140113-F-DW547-026</a>