Student protesters at Columbia University are refusing to back down, taking over a building on the campus in the latest escalation of demonstrations against the Israel-Hamas war. On Monday, students defied a 2 p.m. deadline to leave a pro-Palestinian protest encampment on the university's campus after negotiations between university officials and the protesters broke down. The university issued a notice to those in the encampment saying if they left by the deadline and signed a form committing to abide by university policies through June 2025, they could finish the semester in good standing. If they did not, they would be...