Henry Harley "Hap" Arnold (June 25, 1886 - January 15, 1950) was an American general officer holding the grades of General of the Army and later General of the Air Force. Arnold was an aviation pioneer, Chief of the Air Corps (1938-1941), Commanding General of the U.S. Army Air Forces during World War II, the only Air Force general to hold five-star rank, and the only person to hold a five-star rank in two different U.S. military services.

Arnold was also the founder of Project RAND, which evolved into one of the world's largest non-profit global policy think tanks, the RAND Corporation, and one of the founders of Pan American World Airways. Arnold was one of the first military pilots worldwide, and one of the first three rated pilots in the history of the United States Air Force.

		Maj. General Henry H. Arnold, Chief of the Army Air Forces and staff - 1941. Left to right: Lt. Col. Edgar P. Sorenson, Lt. Col. Harold L. George, Brig. Gen. Carl Spaatz, Chief of Staff; Maj. Gen. Arnold, Maj. Haywood S. Hansell, Jr., Brig. Gen. Martin F. Scanlon, Lt. Col. Arthur W. Vanaman.		Gen. Henry H. Arnold, Commanding General, Army Air Forces, smiles as he steps from his plane at Gatow Airport, Berlin, Germany, to attend the Potsdam Conference.
George Patton, Henry H. Arnold, and Mark Clark				Chiefs of Staff, L to R: Maj. Gen. Lauris Norstad, Gen. Henry H. Arnold, and Gen. George C. Marshall at a meeting during the Potsdam Conference in Germany.
Major Henry H. Arnold with first Liberty V12 engine completed		George Catlett Marshall,Thomas D Harmon, and Henry H Arnold.		General Henry H. Arnold\'s Uniform