Since 1948, the Air Force has conducted cryptologic missions. From Airborne Radio Direction Finding in the Vietnam War to a continuous 25-year plus airborne Intelligence Surveillance and Reconnaissance (ISR) presence in Southwest Asia, the Air Force has had a cryptologic presence in every major conflict in its history. As a permanent fixture in the armed forces intelligence organization, our motto "Freedom Through Vigilance," epitomizes why ISR is a leading USAF core mission.