Paul Williams meets Kevin Vickers, the Canadian Ambassador, who was hailed as a hero for his actions in stopping the October 2014 attack at the Parliament of Canada.He also intervened when a protester tried to disrupt a 1916 commemoration ceremony in Dublin in 2016 and has had a successful 29-year-long career with the Royal Canadian Mounted Police (RCMP), attaining the rank of Chief Superintendent.Ambassador Vickers talks about his time spent in Ireland, his years as a homicide detective and what it was like to face down the terrorist attacker in the Canadian parliament in 2014.