Maj. Mona E. Alexander, U.S. Air Force Expeditionary Center Advanced Study of Mobility Program student and class leader, is promoted to the rank of lieutenant colonel in a ceremony Dec. 2, 2011, at the EC at Joint Base McGuire-Dix-Lakehurst, N.J. Vice Chairman of the Joint Chiefs of Staff Adm. James A. Winnefeld (left) and Jim Hartney, close friend of Alexander from Del Rio, Texas, pinned the new rank on Alexander. The new lieutenant colonel was the aide de camp to Winnefeld when he was the commander of North American Aerospace Defense Command and the U.S. Northern Command headquartered at Peterson Air Force Base, Colorado Springs, Colo. (U.S. Air Force photo/Wayne Russell)