Hometown: Wichita, Kansas
Born 25 March 1938

Sergeant Callahan, one of the more versatile jumpers on the Golden Knights, joined the Army in 1955 after his graduation from high school. The following year he received training as a military policeman and was assigned to Germany, where he remained until 1959. After a number of stateside assignments, he returned to Germany in 1965. In 1967 he went through airborne training in Germany and was assigned to the 7th Army Parachute Team, which performs throughout Europe. The following year he came to the Golden Knights. At 6-foot-7 easily the tallest member of the Knights, Sergeant Callahan also was twice a member of the all-Europe basketball team. Sergeant Callahan is primarily a demonstration jumper who also has done research and development work on new parachutes and air-to-air motion picture photography.