Hijacker Ziad Jarrah on UA 93
September 11, 2001

ZIAD JARRAH: Uh, is the captain. Would like you all to remain seated. There is a bomb on board and are going back to the airport, and to have our demands (unintelligible). Please remain quiet.

The controller responded: "United 93, understand you have a bomb on board. Go ahead." The flight did not respond. At 9:41 a.m., Cleveland Center lost United 93's transponder signal.