TSA begins requiring passengers to remove laptop computers, video cameras and other electronics for separate screening.
TSA ends the Registered Traveler program, leaving it to private companies. The private effort falters.
TSA bans lithium batteries from checked luggage unless they are installed in electronic equipment.
A Nigerian is charged with attempting to detonate explosives in his underwear on Northwest Flight 253, en route from Amsterdam to Detroit..
Passengers are forbidden to leave their seats an hour before arrival; the rule is later eased.
TSA deploys about 500 Advanced Imaging Technology units, or full-body scanners, to screen passengers for non-metallic and metallic threats. It begins using "enhanced" pat-down procedures at airports for secondary screening and for passengers who decline full-body scanning.
TSA finishes implementing its Secure Flight program, in which airlines submit passengers' names for matching against a watch list of known or suspected terrorists.
U.S. Department of Transportation, U.S. Transportation Security Administration, Los Angeles Times, Aviation Safety Network