U.S. Marines with SPMAGTF Crisis Response – Africa and French gendarmes with Mobile Gendarmeries Armored Group march through tear gas to control a mock riot while training in crowd and riot control techniques at the National Gendarmerie Training Center in St. Astier, France, Dec 3, 2014. The exercise allowed the Marines to gain greater knowledge of non-lethal tactics, techniques and procedures while enhancing interoperability with the French Gendarmerie and strengthening the U.S. partnership with France. (U.S. Marine Corps photo by Cpl Jeraco Jenkins/Released)