After 9-11, Customs was moved from the treasury department, Customs then became a part of the Bureau of Customs and Border Protection.
On March 1, 2003, U.S. Customs and Border Protection became the nation's first comprehensive border security agency with a focus on maintaining the integrity of the nation's boundaries and ports of entry. Thus, then Customs became a part of the Bureau of Customs and Border Protection.
The priority mission of U.S. Customs and Border Protection was to prevent terrorists and terrorist weapons from entering the United States and ensuring the security of the nation's borders and ports of entry.
Hence, it protects the American people, and safeguards the nation's border.
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