. >> todd: let's bring in bryan ilenas live at columbia. what is the scene there now? >> we are on the amsterdam avenue side of the campus, the opposite side of where most press has been over last two weeks. you see the gates are locked here. nypd is outside. inside this is close as we can get to hamilton hall, which is where the students are occupied inside. there was chanting as soon as 4:00 a.m., right now it is quiet. this is what we know, be about 12 12:30 in the morning according to the columbia spectator, the school newspaper, students were picketing outside hamilton hall and a bunch of students with sleeping bags and gear left the picket line and stormed the building and barricaded themselves using chairs and tables and the newspaper says they used zip ties to lock down the door. protesters outside hamilton hall locked arms to keep people from going in and chanting started and banter with written things like intifada and free palestine. inside, there were three facility workers inside of hamilton hall when this went down and the three workers left the building