Maj. Gen. Richard Clark, the Eighth Air Force commander, hands over the wing guidon to Brig. Gen. Paul W. Tibbets IV, the 509th Bomb Wing commander, during a change of command ceremony at Whiteman Air Force Base, Mo., June 5, 2015. The presentation of the guidon to Tibbets symbolized the official change of command from the old commander to the new commander. (U.S. Air Force photo/Staff Sgt. Alexandra M. Longfellow)