Access to the campus is restricted to those with university ID. Near the main entrances, a conservative outfit set up two digital billboards that flashed the names and faces of people they considered to be “Columbia’s Leading Antisemites”. Long queues blocked the gates periodically. On the first day back, a few dozen protesters shouted pro-Palestinian slogans and two were arrested. Inside the gates someone threw red paint on Alma Mater, a statue outside Low Library.