The books evidence a desire to flee but equally evidence an ineptitude, the lack of an ability to flee. Buying a ticket for an international flight is akin to making an appointment with the FBI for you to be arrested. The FBI only dreams that every fugitive first pass through inspection/x-ray before being arrested in an airport terminal ringed with security. No need to worry about a fight, weapons or a dangerous police chase. The perps have already been frisked by the FAA. If these people ever run, they won't get far.