From the Guardian:

Foiled al-Qaeda bomb plot likely to lead to changes in US airport security

Homeland security adviser says FBI is testing latest underwear bomb to determine if it would have cleared current systems
The disruption of a plot by al-Qaeda in the Arabian peninsula to attack a US-based jet using what is being billed as an “improved” underwear bomb is likely to lead to increased security at American airports, the chief White House adviser on terrorism has indicated.

The full article is here. I have a feeling that we might have to take more than our shoes off the next time we get on a plane bound for the U.S.A.