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New York police officers in riot gear form a perimeter around occupied Hamilton Hall, left, on the campus of Columbia University in New York, on Tuesday, April 30, 2024. Officers in riot gear began removing demonstrators who had seized Hamilton Hall, a building with a history of student takeovers. Scores of other arrests were made on campuses across the country. (Bing Guan /The New York Times/Fotoarena)
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