Police enter Columbia University's Hamilton Hall amid ongoing protests
Security concerns at Columbia University amid Israel-Hamas war protests
Police make arrests on Columbia University campus amid ongoing protests
Columbia University professor says Congress' involvement in campus protests 'make things worse'
House Speaker Mike Johnson gives remarks at Columbia University amid pro-Palestinian protests
Columbia University students arrested, suspended during Israel-Hamas war protests
Columbia protesters continue encampment despite ultimatum
Pro-Palestinian protests lead to arrests, escalating tensions on college campuses
Campus protests cause tensions to boil over as more erupt
Columbia University warns of consequences for student protesters
