Police clash with campus protesters at Columbia University
Police make arrests on Columbia University campus amid ongoing protests
Police clash with college protesters across the country
Police clash with college protesters across the country
Columbia professor says protesters 'being treated like terrorists' as NYPD makes arrests on campus
Columbia professor says protesters 'being treated like terrorists' as NYPD makes arrests on campus
University of Arizona to arrest college protesters refusing to leave campus
University of Arizona to arrest college protesters refusing to leave campus
Columbia University warns of consequences for student protesters
NYPD clears Columbia University's Hamilton Hall filled with protesters
