US Secretary of Defense Robert Gates (L) and Chairman of the Joint Chiefs of Staff Adm. Mike Mullen testify at a House Armed Services Committee hearing on operation Odyssey Dawn and US Military Operations in Libya on Capitol Hill in Washington March 31, 2011. [Photo/Agencies]
Conservative leader and Canada's Prime Minister Stephen Harper arrives with his wife Laureen to make an announcement during a campaign stop at a shipping dock in Halifax, Nova Scotia March 31, 2011. Canadians will head to the polls in a federal election May 2. [Photo/Agencies]
