ARNOLD, Henry H. (Hap) Arnold, Lieutenant, U.S. Army, with MILLING, T.D., College Park, Maryland, 1912. Published on October 10, 2012 in 9 October 1912Full resolution (340 × 241) ← Previous Next → Lieutenants Henry H. (“Hap”) Arnold and Thomas DeWitt Milling, at College Park, Maryland, 1912. (U.S. Air Force)