A man holds a banner that reads: &#8221;People can change everything&#8221; during a protest march in Paris, Sunday, Feb. 17, 2019. French yellow vest protesters are marking three months since the kickoff of their anti-government movement, as anti-Semitic remarks by some demonstrators have raised national concern about the movement&#8217;s ascendant radical fringe. (AP Photo/Thibault Camus)