The Obama administration takes concrete steps after the Christmas Day bombing attempt on Flight 253. But some of the decisions carry risk.
It wasn't all that relaxing for Obama in Hawaii, but in D.C. the focus is even more intense on who's to blame for the Christmas Day bombing attempt on an airliner bound for Detroit.
New airport security rules mean travelers from 14 countries including Nigeria and Yemen will be subject to mandatory extra screening – including full-body pat-downs – before they can board a flight to the US.
John Brennan, Obama's top counterterrism aide, offered a strong rebuke of Dick Cheney's criticism and suggested that post-9/11 intelligence-gathering networks still can't bring all the relevant information together.
A Danish newspaper is reporting that Denmark's intelligence agency knew that the Somali man who on Friday tried to kill a Danish cartoonist had been held in Kenya for allegedly helping to plot an attack against US Secretary of State Hillary Clinton.
Responding to critics of what is seen as his measured approach, Obama says the “nation is at war against a far-reaching network of violence and hatred." He calls for national unity.
Republicans have focused blame for the security failures of Northwest Flight 253 on Homeland Security Secretary Janet Napolitano. But there are other reasons that many conservatives are dissatisfied with her.
The US is stepping up its efforts in Yemen quietly, giving the country tools and money to comabt terrorism without fanfare. The strategy is the result of lessons learned in Pakistan, in particular.
But first, both Muslim Americans and law enforcement have to change the way they interact.
Europe leaders are now reconsidering using full body scanners that they had until recently opposed as lurid and voyeuristic.