SGT Thomas Buhr repairs a radio system aboard an EC-135 Stratolifter aircraft code-named Looking Glass. The aircraft acts as the backup command and control post for the Strategic Air Command's (SAC) underground command center and its crew would assume all functions in the event that SAC's underground center was destroyed by enemy attack. Three Looking Glass sorties are flown daily by the 2nd Airborne Command and Control Squadron (ACCS) and the 4th ACCS