At the Kelly Grand St. Paddy's bash, terrorism was top o' mind. New York Magazine by Sarah Bernard The annual meeting of the Kelly Gang is normally a festive affair. The get-together, the brainchild of New York Post media columnist Keith J. Kelly, has been held on St. Patrick’s Day for the past three years at Langan’s pub, on 47th Street. The guests: media types and others celebrating their shared surname Kelly and their innate Irishness—over corned beef and cabbage and a pin