CBP: Securing America's Borders (New or Updated) U.S. Customs and Border Protection’s top priority is to keep terrorists and their weapons from entering the United States. While welcoming all legitimate travelers and trade, CBP officers and agents enforce all applicable U.S. laws. CBP prevents narcotics, agricultural pests and smuggled goods from entering the country and also identifies and arrests those with outstanding criminal warrants. On a typical day last year, CBP officers welcomed 1.1 million people at the nation’s 327 land, air and seaports while almost 2,800 we apprehended at and between the ports of entry for illegal entry.
