U.S. Air Force Airman 1st Class Andrew E. Walker, 316th Civil Engineer Squadron electrical power production shop, moves power cables for a mobile generator outside the Tactical Fitness Center at Joint Base Andrews, Md. Airmen from the 316th CES set up auxiliary power and air conditioning units for U.S. Army Soldiers staying at the fitness center prior to the Army’s 250th Birthday Festival and Parade June 14 in Washington, D.C. (U.S. Air Force photo by Patrick Griffith)