Former Canadian PMs Mulroney, Turner, Clark and Martin pose during an event on Parliament Hill in Ottawa...
Former Canadian Prime Ministers Brian Mulroney (seated, L), John Turner (seated, R), Joe Clark (standing, L) and Paul Martin pose during an event marking the 150th anniversary of the first meeting of the first Parliament, on Parliament Hill in Ottawa, Ontario, Canada, November 6, 2017. REUTERS/Chris Wattie