Footage courtesy of Al Jazeera. The driver of a large truck that mowed down hundreds of revellers at Bastille Day celebrations in Nice drove in a zig-zag fashion at about 70km/h to hit as many people as possible, say witnesses. Officials have confirmed 77 people are dead after the truck, laden with grenades and weapons, ploughed into a crowd celebrating Bastille Day on the Promenade des Anglais in Nice, France, during a fireworks display.