PrimeTime Politics MPs Olivia Chow (NDP), Rick Dykstra (Conservative), and Gerard Kennedy (Liberal) join Peter Van Dusen to discuss security costs for the upcoming G8 and G20 summits.   Martin Stringer speaks with Jawed Ludin, Afghanistan’s ambassador to Canada, about the latest political negotiations in his home country and Canada’s post-2011 role. Journalists Joël-Denis Bellavance (La Presse) and Greg Weston (Sun Media) analyze the latest developments in Parliament Hill. Also: Finance Minister Jim Flaherty answers questions in Toronto Gen. Walter Natynczyk, Canada’s chief of defence staff, hosts U.S. Admiral James Winnefeld, making his first trip to Canada as commander of North American Aerospace Defense Command (NORAD) Gen. Walter Natynczyk, Canada’s chief of defence staff, testifies at the Senate Committee on National Security and Defence