The announced today it will be open to students, faculty and staff on April 20, but closed to unauthorized non-affiliates due to the disruption caused by the 4/20 gathering. “The gathering disrupts teaching and research right in the heart of the campus,” said CU-Boulder Chancellor Philip P. DiStefano. “The size of the crowd has become unmanageable, and limits our faculty, staff and students from getting to class, entering buildings and doing their basic work. It needs to end.”