The Air Force Intelligence, Surveillance and Reconnaissance Agency (Air Force ISR Agency or AFISRA) was until 29 September 2014 a field operating agency of the United States Air Force headquartered at Lackland Air Force Base, Texas. On that date it was redesignated Twenty-Fifth Air Force and aligned as a numbered air force (NAF) of the Air Combat Command. Originally called the United States Air Force Security Service, the Air Force ISR Agency was activated on 20 October 1948, at Arlington Hall, Washington, D.C., with a mission of cryptology and communications security.