During the September 11 attacks , the Cleveland ARTCC handled the radio traffic from United Airlines Flight 93 , which was inside the center 's airspace from before the hijacking to the time of its crash . In April 2011 , one controller and one manager at the center were suspended over allegations that the controller was watching a movie on an early-morning , low-traffic shift
September 11 attacks
September 11 attacks
Cleveland Air Route Traffic Control Center