When Europe agreed to open its borders to Syrian refugees in response to one of the greatest humanitarian crises of our age, officials assured the Western world: we’ve got this. There will be no jihadists among them; and if there are, we’ll be sure they won’t get in.
But it wasn’t exactly true. Jihadists, we now know, have been among them. They have gotten through. And now those same officials are starting to admit things might get even worse.