The O-2 Skymaster was a military version of the Cessna 337 Super Skymaster 4-6 passenger general aviation aircraft. It was purchased by the U.S. Air Force beginning in 1967 in two versions. The O-2A was used in the forward air control mission. It was equipped with additional radios and ordnance hard points under the wings for rocket and machine gun pods. The O-2B was the 337 civilian version modified to carry a large loud speaker on the right side of the fuselage and a leaflet chute in the belly for psychological warfare operations.