Pro-Palestinian protesters blocked by police from accessing an encampment at the Massachusetts Institute of Technology broke through fencing to retake the area, as Columbia University canceled its university-wide commencement ceremony following weeks of demonstrations. Other protesters at MIT Monday sat on Massachusetts Avenue, blocking evening rush-hour traffic in Boston. Officials at Columbia in New York City said in a statement Monday that instead of a large graduation event, it will focus on smaller school-level graduation ceremonies. Emory University says it's moving its commencement from its Atlanta campus to a suburban arena. Campus protests have sprung up across the U.S. stemming from the conflict that started when Hamas militants attacked southern Israel in October. Read morePro-Palestinian protesters break through barricades to retake MIT encampment