The Airborne Launch Control System units included the 2 ACCS at Offutt (1970 to 1994) and the 4 ACCS at Ellsworth (1970 to 1992). In 1994, the 2 ACCS became the 7 ACCS. The ALCS personnel are now part of US Strategic Command and in the 625 Missile Operations Flight, an AFSPC unit at Offutt.