At Columbia University‚ tensions between the administration and students protesting over Israel's war in Gaza have reached the point that scores of New York City police marched onto campus to clear an encampment and arrest demonstrators who had commandeered a classroom building. It was the second time in as many weeks that the administration has called on police to control the protests. Students have been suspended‚ and threatened with expulsion. Police are now stationed around-the-clock on...