Friday’s announcement that Canadian resident Muhammad Shahzeb Khan had been arrested as he was crossing the border to commit a terrorist attack in New York revealed, once again, the severe and continual shortcomings of Canada’s immigration system. All day, Prime Minister Justin Trudeau, for his part, was nowhere to be seen.

Even his usual vague noises about how the glorification of violence is never acceptable was absent. There was no press announcement, no reassurance that policies or security would be strengthened to keep ISIS sympathizers out of our country. Instead, Trudeau appears to have spent the day tweeting about the paralympics.