Members of the National Gendarmerie Intervention Group (GIGN) are pictured during a training exercise in case of a terrorist attack, in collaboration with Recherche Assistance Intervention Dissuasion (RAID) and Research and Intervention Brigades (BRI) in the presence of French Interior Minister Bernard Cazeneuve at la Gare Montparnasse, center Paris on April 20, 2016. (Photo by Miguel Medina/Reuters)
