French police fire tear gas at "Yellow Vests" protesters in Paris

"Yellow Vests" protesters shout slogans near the Arch of Triumph in Paris, France, on Dec. 8, 2018. Riot police fired tear gas and water cannon at "Yellow Vests" protesters marching in Paris on Saturday in the fourth week-end action despite President Emmanuel Macron's series of concessions. (Xinhua/Chen Yichen)