Investigators: Northwest Bomb Plot Planned by al Qaeda in Yemen  —  Officials Say Bomb Materials Sewn Into Suspect's Underwear by Top Terror Bomb Maker  —  The plot to blow up an American passenger jet over Detroit was organized and launched by al Qaeda leaders in Yemen who apparently sewed bomb materials …

Passengers Took Plane's Survival Into Own Hands  —  Despite extensive spending since 2001 on intelligence and counterterrorism programs, sophisticated airport scanners and elaborate watch lists, it was something simpler that averted disaster on a Christmas Day flight to Detroit: alert and courageous passengers and crew members.

Restrictions Rise After Terrorism Attempt  —  Transportation authorities began imposing tighter security measures at airports on Saturday and ordered new restrictions governing the activities of passengers during flights as investigators conducted searches to learn more about the Nigerian …

Jasper Schuringa subdued alleged terrorist Umar Farouk Abdulmutallab on Northwest Airlines 253  —  The passenger who tackled a suspected terrorist on Northwest Airlines Flight 253 said Saturday that he's “happy” to be alive.  —  Jasper Schuringa, a video director and producer from Amsterdam …

Travel Advisory  —  Air Canada advises passengers travelling to the U.S. that due to enhanced government security measures air travellers should arrive early at airports to allow extra time to clear security screening.  Passengers should also expect flight delays, cancellations and missed connections …

Terror hero: I didn't hesitate  —  A Dutch airline passenger told The Post how he leapt into action when an alleged Muslim terrorist tried to blow up a Detroit-bound airliner packed with 300 people just moments before landing.  —  Chaos erupted as alleged terrorist Umar Farouk Abdul Mutallab …

Hoekstra Quickly Politicizes Attempted Terrorist Attack, Suggests Obama's Clueless On National Security  —  Yesterday, the White House announced that there had been “an attempted act of terrorism” aboard a trans-Atlantic Northwest Airlines flight arriving from Amsterdam as it was preparing to land in Detroit.

After health-care reform, Senate reform  —  This column appears on the cover of Sunday's Outlook section.  —  On Dec. 8, 1964, Mike Manatos wrote a letter that explains what's wrong with the Senate in 2009.  This wasn't, of course, the subject of his letter.