Airborne Launch Control Center

An Airborne Launch Control Center (ALCC AL-see) is an aircraft equipped to provide a survivable launch capability for the United States Air Force's LGM-30 Minuteman Intercontinental Ballistic Missile (ICBM) force by utilizing the Airborne Launch Control System (ALCS) on board which is operated by an airborne missileer crew. Historically, from 1967–1998, the ALCC mission was performed by United States Air Force Boeing EC-135 command post aircraft.

Source: Wikipedia — Airborne Launch Control Center (CC BY-SA 4.0)