The 3,755 “terrorists” caught at the southern border were mainly individuals who showed up at airports around the world (not on the southern border) and were rejected because their name, or one like it, was on a no-fly list or the even larger list of names of people barred from entry in to the United States for any one of dozens of reasons. Had they been wanted terrorists, in most countries they would have been arrested by local authorities on the spot. Indeed, if known and wanted terrorists had shown up at the southern border, Customs and Border Protection officers would have taken them into custody. That, of course, did not happen.