The 5th Security Forces Squadron (5 SFS) is a unit of the United States Air Force (USAF) responsible for air base defense, law enforcement, and emergency services on Air Force bases. It operates under the Air Combat Command, with its headquarters stationed at Joint Base San Antonio-Randolph in Texas. The 5 SFS is one of the largest and most active Security Forces squadrons in the USAF, providing essential security and operational support to ensure the safety and readiness of U.S. air bases worldwide. Members of the 5 SFS are trained in various security disciplines such as tactical law enforcement, explosive ordnance disposal, physical security, canine operations, and air base ground defense.