Is there an absence of a logical link between 'American also began getting identifications of the hijackers, as Ong and then Sweeney passed on some of the seat numbers of those who had gained unauthorized access to the cockpit.' and 'The hijackers had planned the attack before the night.'
American also began getting identifications of the hijackers, as Ong and then Sweeney passed on some of the seat numbers of those who had gained unauthorized access to the cockpit.###The hijackers had planned the attack before the night.