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U.S. Soldiers to Receive Lie-Screening Devices

The U.S. Army will issue hand-held screening devices to soldiers in Afghanistan this month. The devices, which measure physiological data, will be used in questioning suspects in crisis situations, like roadside bombings, to help Army personnel determine whose account to trust.

Donald Krapohl, special assistant to the director at the Defense Academy for Credibility Assessment at Fort Jackson in South Carolina, helped develop the devices. He talks to Scott Simon about how they work.

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