WASHINGTON—Every day, an average of 10 known or suspected terrorists are prevented from entering the United States, according to the Department of Homeland Security (DHS). These are individuals flagged on a U.S. terror watch list; most are encountered at airports or even while still overseas as they apply for a visa.
On top of that, 3,000 “special-interest” aliens were apprehended at the southwest border last year, DHS Secretary Kirstjen Nielsen said on Jan. 4.