SHAW AIR FORCE BASE, S.C. -- Capt. Weston Killian, 77th Fighter Squadron weapons chief, flies an F-16 to McEntire Joint National Guard Base, S.C., May 6, 2011. Shaw's 20th Fighter Wing alert facility has guarded the East Coast since Sept. 11, 2001, through Nov. 15, 2003, and Aug. 1, 2006, through May 9, 2011. (U.S. Air Force photo/Tech. Sgt. Louis Rivers)