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NICE, FRANCE - JULY 15: People visit the scene and lay tributes to the victims 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 lorry 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 David Ramos/Getty Images)

NICE, FRANCE - JULY 15:  People visit the scene and lay tributes to the victims 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 lorry 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 David Ramos/Getty Images)