Department of Homeland Security: Ten Years and 56 billion later, not adapting to changing terrorist tactics:

According to Ben Brandt, a former adviser to Delta, the airlines and the feds should be less concerned with what gels your aunt puts in her carry-on, and more concerned about lax screening for terrorist sympathizers among the airlines’ own work force. They should be worried about terrorists shipping their bombs in air cargo. And they should be worried about terrorists shooting or bombing airports without ever crossing the security gates.