The parliament building in Canada's capital reopened to visitors on Saturday, three days after a homegrown radical rushed in armed with a rifle after shooting dead a soldier at a nearby war memorial, Reuters reported. The grounds of the hilltop Gothic building, whose clock tower is a centerpiece of Ottawa’s skyline, attracted scores of visitors, many still stunned by Wednesday'’ attack, in which 24-year-old Corporal Nathan Cirillo, was gunned down by Michael Zehaf-Bibeau. The Royal Canadian Mounted Police is asking the public for help in tracing the movements of Zehaf-Bibeau from Oct. 2- 22.