4 arrested after some protesters breach DNC security fence, police say
Police clash with college protesters across the country
Columbia professor says protesters 'being treated like terrorists' as NYPD makes arrests on campus
Columbia University warns of consequences for student protesters
Police clash with campus protesters at Columbia University
Campus protesters demanding schools cut ties with Israel amid hundreds of arrests
Student protesters demand schools cease US funding of Israeli military
Protesters in Israel demand the return of hostages taken by Hamas terrorists
University of Arizona to arrest college protesters refusing to leave campus
LAPD declares "city-wide tactical alert" as officers move in on protesters at UCLA
