“As of mid-2011, terrorist threat groups present in the Homeland are not known to be actively plotting against civil aviation targets or airports; instead, their focus is on fundraising, recruiting, and propagandizing,
…the government concedes that it would be difficult to have a repeat of 9/11 due to hardened cockpit doors and the willingness of passengers to challenge hijackers rather than assume a hijacking merely means a diversion to Cuba.”