Members of the Raid special intervention unit of the French police take part in a terrorist attack mock exercise on May 31, 2016 near the Stade de France in Saint-Denis, France. France said on May 25 it will deploy more than 90,000 police and security guards for Euro 2016, vowing to do &#39;everything possible to avoid a terrorist attack&#39; during the football tournament that starts next month. / AFP / KENZO