He revealed that half the officers in a key unit failed a polygraph test last year.

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Unlike a polygraph test, which checks for lies, Nemesysco's systems work as an "emotion detector, " says Nemesysco CEO Amir Liberman.

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Why, then, despite failing a polygraph test, was the chief suspect at Los Alamos National Laboratory fired only after the spy story broke?

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The FBI then administered a polygraph test on Lee.

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King said Tuesday night that Sullivan's answers to his committee's questions disclosed that three of the 12 Secret Service agents involved in the scandal had refused to cooperate with authorities and submit to a polygraph test.

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He told reporters two weeks ago that he had nothing to do with the attacks, had never worked with anthrax and had been told by the FBI that he had passed a polygraph test and was not a suspect.

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