Building takeovers push campus protests into volatile new phase

The protest movement roiling college campuses across the United States appeared to enter a more dangerous phase Tuesday, as student demonstrators who had barricaded themselves inside a hall at Columbia University were arrested overnight by police in riot gear, and protesters on both sides of the Israeli-Palestinian conflict clashed violently at the University of California, Los Angeles.

By moving from tents on a lawn to inside a building the students at Columbia sharply escalated the crisis. In parallel moves this week, protesters have also occupied buildings at some other U.S. campuses.

And while some experts say the increased pressure could still ultimately help the protesters secure some of their demands or gain