Obama's five options on improving airport security

Some things likely to be quickly addressed are specific to last Friday’s attack. They include giving more weight to complaints from family members that a relative has become radicalized and may engage in terrorism.” The Saudis will tell you that’s some of the most important and reliable information you can get,” said Fran Townsend, homeland security coordinator under President George W. Bush.

There are other obvious loops to be closed. Officials say they’re considering an automatic review of outstanding visas for people entered into the broad U.S. terrorism database. And perhaps greater information-sharing with allies like Britain, which, unbeknownst to the U.S., refused to grant Abdulmutallab a new student visa after he allegedly provided the name of a non-existent school.