Bodycam footage released by the New York City Police Department (NYPD) shows officers breaking through barriers set up by protesters at Columbia University in New York City on April 30.The footage shows officers forcing their way through blockaded doors at Hamilton Hall.NYPD officers descended on the Columbia University campus on Tuesday night to clear protesters inside and outside buildings.Toward the end of the footage, officers can be heard discussing using a flash-bang, after which a series of loud bangs are heard.Nearly 100 people were arrested during the clearing of the protesters, local media reported, citing police. Credit: NYPD via Storyful