There were extensive flight cancellations and delays yesterday after British authorities revealed they had broken up a plot to use liquid explosives to blow up passenger aircraft flying between the United Kingdom and the United States.

NPR: Airlines Take Security Alert in Stride

This contributed to the larger failure to connect the fragments of intelligence that could have revealed the plot, Abdulmutallab's extremist views, AQAP's involvement with a Nigerian, its desire to strike the U.S. homeland.

WHITEHOUSE: Press Briefing on Security Review