American expat Kate Moore drops her kids at the international school, makes her shopping rounds, and meets her husband Dexter at their regular café. Across the Seine, tech CEO Hunter Forsyth stands on his balcony, perplexed that his police escort just departed, and frustrated that his cell service has cut out; Hunter has important calls to make, not all of them technically legal. And on the nearby rue de Rivoli, Mahmoud Khalid climbs out of an electrician’s van, and elbows his way into the crowded courtyard of the world’s largest museum, in the epicenter of Western civilization. He sets down his metal briefcase and removes his windbreaker. That’s when people start to scream.