BORDER AND TRANSPORTATION SECURITY DIRECTORATE
Border and Transportation Security Directorate. The division of the U.S. Department of Homeland Security responsible for maintaining the safety of the nation’s borders and transportation systems. ? The Directorate includes the Transportation Security Administration, the U.S. Customs Service, the border security functions of the U.S. Citizenship and Immigration Service, the Animal & Plant Health Inspection Service, and the Federal Law Enforcement Training Center. It is the Department’s largest division. ¡ª Abbr. BTS.
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