CBP (U.S. Customs and Border Protection) is the DHS component that secures U.S. borders and ports of entry and combines customs, immigration inspection and agricultural protection; it includes the U.S. Border Patrol (USBP). USBP is the Border Patrol arm of CBP that patrols between ports of entry to detect and stop unlawful entries. ICE (U.S. Immigration and Customs Enforcement) carries out interior enforcement — identifying, arresting, detaining and removing noncitizens and investigating transnational crime (through ERO and HSI). USCIS (U.S. Citizenship and Immigration Services) administers immigration benefits and adjudicates visas, asylum, naturalization and other lawful immigration applications (not primarily an enforcement agency).