New rules for airline travel

Until Dec. 30

-- U.S.-bound passengers aboard international flights must undergo a "thorough pat-down" at boarding gates, focused on the upper legs and torso. All carry-on baggage must be inspected.

-- Passengers must remain seated for the final hour before landing. During that time, they may not have access to their carry-on baggage or hold personal items on their laps.

-- While over U.S. airspace, flight crews may not make any announcements to passengers concerning the flight path or the airplane's position over cities or landmarks.