Staff Sgt. Aaron Zibbel ties caution tape to one of the anchors that will be used to support the frame of the Sprung structure Sept. 6, 2011, on Wake Island. The three structures that will eventually be built will be used to house aircraft generation equipment, civil engineering supplies and vehicle maintenance operations. Zibbel is an electrician assigned to the 611th Civil Engineer Squadron at Joint Base Elemendorf-Richardson, Alaska. (U.S. Air Force photo/Capt. Amy Hansen)