Cessna O-1F 57-2976 United States Air ForceThese are 1 72 scale decals for Cessna O 1F Bird Dog 57 2976, assigned to the 21st Tactical Air Support Squadron (TASS), United States Air Force. The O 1F was a variant of the Bird Dog converted from U. S. Army TL 19D airframes for USAF service, featuring dual controls and updated avionics. The 21st TASS operated the O 1F in the forward air control role, with crews flying low and slow over the battlefield to locate enemy positions, mark targets with