CBS News Correspondent Steve Dorsey talks with White House Correspondent Steven Portnoy in Hamburg, Germany, at the G20 where President Trump met with Russian President Vladimir Putin. Correspondent Cami McCormick reports on Defense Secretary James Mattis responding to the North Korean intercontinental ballistic missile test. CBS News Senior National Security Analyst Fran Townsend talks about the North Korea threat to CBS This Morning. That and more on the CBS News Weekend Roundup.