F.E. WARREN AIR FORCE BASE, Wyo. - Maj. Gen. C. Donald Alston, the new Twentieth Air Force commander, salutes Lt. Gen. Frank Klotz, Air Force Global Strike Command commander, after assuming command of the Twentieth Air Force in a change of command ceremony here at the Argonne Parade Field July 1. This was the first change of command since Air Force Global Strike Command took over responsibilities of the nation's intercontinental ballistic missile force in December. (U.S. Air Force photo/Jeff Allred)