The 439th Operations Group is an active United States Air Force Reserve unit. It is the flying component of the Twenty-Second Air Force 439th Airlift Wing, stationed at Westover Air Reserve Base, Massachusetts. Difficult weather conditions and heavy anti-aircraft fire were encountered and three aircraft failed to return. A reinforcement mission with gliders was flown on the following day, with 50 C-47s towing 30 Horsa and 20 CG-4 Wacos. The 439th later received a Distinguished Unit Citation for its work during these two days.