(From left) Airmen 1st Class Erik Carter and Jason Harvey verify the identification of a motorist arriving at the main gate of Grand Forks Air Force Base, N.D. , on Aug. 2, 2012. All visitors are required to show a valid driver's license, valid State ID, or passport to the on duty entry controller to verify the visitor's identity prior to them receiving a pass. (U.S. Air Force photo/Staff Sgt. Luis Loza Gutierrez)