Security screening at US airports has undergone waves of changes in the years since 9/11. Here are five of the biggest changes to affect air travelers in recent years.
The Department of Homeland Security this week warned airlines to be on the lookout for shoe bombs on US-bound flights. Intelligence points to a possibility that new shoe-bomb technology may be out there.
Disgraced Army major Nidal Malik Hasan admitted he killed 13 at Fort Hood in 2009 and tried to make himself out as a 'holy warrior.'
As more than 1,000 terrorism trials over the last decade show, the federal court system is well equipped to handle terrorism cases like that of Boston bombing suspect Dzhokhar Tsarnaev. His trial may also help harmonize US counterterrorism efforts with those of its allies.
Britain released Islamist preacher Abu Qatada on bail Monday after a British court ruled he could not be extradited to Jordan.