Members of the 316th Civil Engineer Squadron fold the cover from a small shelter system personnel tent for storage 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 working during 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)