On Tuesday, Marc Miller — breathless, voice quaking, and noticeably nervous — told reporters, “I’ve been getting questions about an individual that entered Canada and has been arrested in charges related to an attempt to cross the border for a terrorist plot.” He then confirmed that Muhammed Khan is a Pakistani national who was issued a student visa in May 2023, and waltzed into Toronto’s Pearson airport the following month. Miller had the disposition of someone surprised by the news, but he shouldn’t have been. Our student visa program has always been one of the weakest links in Canada’s national security.