U.S. Air Force Col. David Crow, Air Combat Command installation and mission support Expeditionary Combat Support Division chief runs during 4th annual “Race 'Round the Base” at Langley Air Force Base, Va., Dec. 14, 2013. More than 100 runners from Joint Base Langley-Eustis and the surrounding area participated in the event. (U.S. Air Force photo by Staff Sgt. John D. Strong II/Released)