So now, what you have is most Sunnis have fake Shiite identification cards, hoping they will somehow pass, get through these checkpoints and not be either kidnapped, shaken down for money, or worse, still killed.

NPR: Two Neighborhoods Illustrate Baghdad's Divide

As Secretary Napolitano will explain, the screening technologies that might have detected these explosives are in use at the Amsterdam airport but not at the specific checkpoints that he passed through.

CNN: Transcript: Obama outlines steps to prevent terrorism