Yesterday's Air Force: Gen. Henry ‘Hap’ Arnold Published Dec. 2, 2016 By Staff Sgt. Traci Keller Air Force TV FORT GEORGE G. MEADE, Md. (AFNS) -- This episode of Yesterday's Air Force looks at the career of Gen.Henry H. "Hap" Arnold, the only man to ever hold both grades of general of the Army and general of the Air Force. Yesterday's Air Force is a history and heritage featurette series profiling significant people and missions from the Air Force's past.