These DHS organizations include United States Citizenship and Immigration Services (USCIS), Customs and Border Protection (CBP) and Immigration and Customs Enforcement (ICE). Together they provide the basic governmental framework for regulating the flow of visitors, workers and immigrants to the United States. | These DHS organizations include United States Citizenship and Immigration Services (USCIS), Customs and Border Protection (CBP) and Immigration and Customs Enforcement (ICE). Together they provide the basic governmental framework for regulating the flow of visitors, workers and immigrants to the United States. |