Staff Sgt. Emmanuel Hernandez and Airman 1st Class Christopher Taylor, 316th Civil Engineer Squadron structures shop workers, fold the cover from a small personnel tent to store at Joint Base Andrews, Md., April 14, 2010. Members of the 316 CES broke the tent and other temporary locations around base down that supported Andrews staff during the Nuclear Security Summit. The 316th Wing led Joint Base Andrews in providing a transition location for a number of foreign national leaders arriving from around the world in attendance of the summit. (U.S. Air Force photo by Staff Sgt. Christopher Marasky)