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U.S. transportation systems and the estimated 4,000 transportation facilities move over 30 million tons of freight and provide an estimated 1.1 billion passenger trips each day. Since 2001 the Transportation Security Administration (TSA), part of the Department of Homeland Security (DHS) has protected these systems and facilities from terrorist attack. One program TSA utilizes is the Transportation Worker Identification Credential (TWIC) program, through which a common credential is being developed for transportation workers with access to secure areas. Ultimately planned for all transportation sectors, TSA, in cooperation with the U.S. Coast Guard, is initially focusing the TWIC program on the maritime sector. This testimony discusses (1) the progress made in implementing the TWIC program and (2) some of the remaining program challenges. This testimony is based on GAO's September 2006 TWIC report, as well as selected updates and ongoing work. To conduct this work, GAO reviewed program requirements and guidance, documentation on the status of the TWIC program, and interviewed program officials from TSA and the Coast Guard.

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