25th Anniversary Timeline WTC 2001 : 8:13:52 am : Boston Center Sector 46 controller Pete Zalewski instructs Flight 11 to climb to 35,000 feet twice, but receives no reply.

He informs the Athens Sector controller that the flight is “NORDO” (no radio). Boston Center continues to attempt to re-establish contact with the flight without success. –

25th Anniversary Timeline WTC 2001 : 8:13:52 am : Boston Center Sector 46 controller Pete Zalewski instructs Flight 11 to climb to 35,000 feet twice, but receives no reply.

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