The U.S. Department of Homeland Security (DHS) was formed after September 11, 2001 in order to protect the U.S. Creation of DHS involved reorganizing and repurposing multiple portions of the government that previously oversaw immigration, naturalization and border issues.

DHS now oversees the U.S. Citizenship and Immigration Services (USCIS), a division that handles all immigration related matters; U.S. Customs and Border Protection (CPB), a division that tracks the entry and exit of travelers and products into and out of the U.S.; and U.S. Immigration and Customs Enforcement (ICE), a division that investigates and enforce customs and immigration laws within the U.S.

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