An exit verification system has been sought since after the Sept. 11, 2001, terrorist attacks, but efforts to build one have been repeatedly stymied, most often because of the projected costs. Earlier this year, John Cohen, deputy counterterrorism coordinator for the Homeland Security Department, told a congressional panel that the agency was finalizing plans for a biometric data system to track who leaves the country and when. He didn't give details.
Associated Press writer Suzanne Gamboa contributed to this report.
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