NICE, FRANCE – JULY 15: Forensic police investigate a truck at the scene of a terror attack on the Promenade des Anglais on July 15, 2016 in Nice, France. A French-Tunisian attacker killed 84 people as he drove a truck through crowds, gathered to watch a firework display during Bastille Day celebrations. The attacker then opened fire on people in the crowd before being shot dead by police. (Photo by Patrick Aventurier/Getty Images)