Page "Aircraft hijacking" Paragraph 18

On 9 / 11, the sucicide hijackers did not make any attempt to contact ground control to inform anyone about their hijackings, nor engage in any dialogue or negotiations at all.

However, the hijacker-pilot of Flight 11 and the ringleader of the terrorist cell, Mohamed Atta, mistakenly transmitted announcements to ATC, meaning to go through the Boeing 767.

Also, Amy Sweeney and Betty Ong called the American Airlines office, telling the workers that Flight 11 was hijacked.

9 / 11 pilot hijacker Ziad Jarrah aboard Flight 93 also made a similar error when he mistakenly transmitted announcements to Cleveland ATC about the hijacking.