Pro-Palestinian protesters take over Columbia University building

Students with the Gaza Solidarity Encampment block the entrance of Hamilton Hall at Columbia University after taking over it on April 30, 2024 in New York.

Dozens of protesters took over a building at Columbia University in New York early Tuesday, barricading the entrances and unfurling a Palestinian flag out of a window in the latest escalation of demonstrations against the Israel-Hamas war that have spread to college campuses nationwide.