LANGLEY AIR FORCE BASE, Va. -- Airman 1st Class Kathy Shih (left) and Senior Airman Mathew Delmonico, 633d Security Forces Squadron patrol, prepare a citation for an abandoned vehicle at the Langley Airman dormitories Sept. 9. The 633 SFS will ticket illegally parked vehicles base-wide during Operation Clean Sweep Sept. 29-30. Owners of ticketed vehicles will have 72 hours following the citation to move the vehicle or face the expense and inconvenience of towing and impoundment. (U.S. Air Force photo/Airman 1st Class Jason J. Brown) (RELEASED)