LANGLEY AIR FORCE BASE, Va. -- Langley chiefs receive training during the 1st Security Forces Squadron guardmount as they prepare to perform installation entry controller duties here April 1. This duty ensures every vehicle operator entering the base has a valid identification card. Langley's enlisted senior leadership volunteer for this duty at least once a quarter. (U.S. Air Force photo/Senior Airman Vernon Young)

LANGLEY AIR FORCE BASE, Va. -- Chief Master Sgt. John Evalle, 1st Mission Support Group superintendent, ensures each vehicle operator entering the base has a valid identification card during the morning rush at the LaSalle Gate here April 1. Langley's enlisted senior leadership currently volunteer to perform installation entry controller duties at least once a quarter. (U.S. Air Force photo/Senior Airman Vernon Young)