The University of Colorado Boulder campus will remain closed today for 4/20, a judge has ruled, despite a lawsuit by marijuana activists. The University's decision was taken to try to prevent the annual pot smoke-out rally and demonstration. The pot-activists filed suit yesterday, but the judge ruled in the favor of CU, after a student, a professor, the dean, and CU campus Police Chief Joe Roy all testified. Activists believe the CU's closure is unconstitutional and violates their First Amendment rights. "CU's proposed closure of an entire campus to shut down an afternoon protest occurring on a small portion of the campus is without legal support or precedent," they state. Officials at CU say the 4/20 event in past years has attracted up to 10,000 people, and the closure is in the best interests of protecting students. "Because of the disruption that 4/20 has caused over the years and the complaints I got from staff faculty and constituents, we took this bold move to close campus," says Chancellor Phil DeStefano. Police officers are at campus entrances today, checking every ID to make sure no visitors get in. Anyone who makes it in without ID could possibly face jail time or a $750 fine for trespassing.