U.S. Soldiers with the 1151st Engineer Company, 133rd Engineer Battalion, 87th Sustainment Brigade finish nailing up a brace for the floor joist on newly constructed B-hut living quarters on Forward Operating Base Lightning, Afghanistan, Dec. 10, 2013. The 1151st Engineers are building living quarters on FOB Lightning for incoming soldiers from outlying FOBs. (U.S. Army photo by Spc. Charles M. Willingham/Released)