Officer Donald Harris, a Department of the Air Force guard with the 633rd Security Forces Squadron, finalizes paperwork with a contractor for access to Langley Air Force Base, Va., Mar. 20, 2012. Langley AFB and Fort Eustis will soon be switching to the Defense Biometric Identification System to improve security and civilian access to the base when necessary. (U.S. Air Force photo by Airman 1st Class Austin Harvill/Released)