U.S. Air Force Maj. Gen. Richard M. Clark, 8th Air Force commander, center, discusses aircrew tactics, techniques and procedures with Brig. Gen. Paul W. Tibbets IV, 509th Bomb Wing commander, left, and other members of the 509th BW at Whiteman Air Force Base, Mo., April 12, 2016. Clark visited Whiteman to observe operations during the Constant Vigilance 16 exercise. (U.S. Air Force photo by Airman 1st Class Michaela Slanchik)