An international symposium about how democratic governments treat non-citizens in their countries during wartime, "Alien Enemies in Wartime: Race, Ethnicity and Civil Liberties," will be held at the University of Colorado at Boulder April 4-6. The symposium, which is free and open to the public, will begin Thursday, April 4, at 7 p.m. at the Colorado Chautauqua Association's Community House on Morning Glory Drive in Boulder's Chautauqua Park.