David Gergen's Voice: Transcript: CNN's CAMPBELL BROWN Al Qaeda ...

UNIDENTIFIED MALE: The double agent was brought onto the CIA base in Afghanistan without first being given a polygraph test, one of the basic tools in establishing a spy's trustworthiness. He had provided bona fide information, .... BERNTSEN: Not if you don't have equipment in those airports that detects explosives. We still -- the majority of the airports that we have don't have equipment that detects explosives for every person that goes through. They test some of it . ...