Fifty years since one of the worst massacres in Britain, residents in Londonderry, also known as Derry, yesterday marked the anniversary of Bloody Sunday, when British troops opened fire on civil rights protesters and gave way to decades of chaos in Northern Ireland. Al Jazeera reports that, retracing the steps of the original march, relatives of the victims, who for many the memories of that day are still vivid and many of whom are still demanding justice, staged a walk of remembrance along the route where, in 1972, a British elite parachute regiment shot 14 Catholic marchers dead.