FILE - In this May 5, 1981 file photo British troops, in foreground, clash with demonstrators in a Catholic dominated area of Belfast, Northern Ireland. The chaotic scenes during a week of violence on the streets of Northern Ireland have stirred memories of decades of Catholic-Protestant conflict, known as "The Troubles." A 1998 peace deal ended large-scale violence but did not resolve Northern Ireland's deep-rooted tensions. (AP Photo, File)