AEHF-4 launch provides critical support to users
Personnel in the 4th Space Operations Squadron at Schriever Air Force Base, Colorado, make first contact with the Advanced Extremely High Frequency Four satellite, Oct. 16, 2018. The system is a joint-service satellite communications system, providing survivable, global, secure, protected and jam-resistant communications for high-priority military ground, sea and air assets. (U.S. Air Force photo by Staff Sgt. Matthew Coleman-Foster)