Kent- Police in riot gear arrested a dozen protesters at an anti-war rally that spilled off the Kent State University campus yesterday, hours after a peaceful commemoration of the May 4, 1970, student shootings. About 200 police from Kent and surrounding communities stopped a group that police estimated numbered between 250 to 300 marchers after they left campus, arresting 12 on charges of disorderly conduct. Police said additional charges and arrests may follow after the incident is reviewed. None of those arrested were Kent State students. The arrests ended a tense day of uncertainty. A State Highway Patrol helicopter buzzed...