Is 'Transmission of the Authorization from the White House to the Pilots The NMCC learned of United 93's hijacking at about 10:03.' a logical precursor to the hypothesis 'The NMCC heard about the hijacking of United 93 at 10:03.'
Transmission of the Authorization from the White House to the Pilots The NMCC learned of United 93's hijacking at about 10:03.###The NMCC heard about the hijacking of United 93 at 10:03.