Airmen board an aircraft Jan. 28 to deploy from Ellsworth Air Force Base, S.D. to Southwest Asia. A new air and space expeditionary force baseline was announced Sept. 10, 2010, which changes the AEF rotational baseline from 120 to 179 days for the active component. The transition to the new baseline begins this month. (U.S. Air Force photo/Staff Sgt. Michael B. Keller)