After largely peaceful marches on Saturday, clashes broke out in the evening. But a large-scale police presence, 1,000 arrests and the rerouting of protest routes kept a lid on wholesale vandalism.

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Americans on hand for the N.F.L.’s first-ever game in France found famous museums closed and shops boarded up.

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A movement that began with a few high schools has broadened to encompass labor unions and other activists.

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