George Herbert Walker Bush, the 41st president of the United States has died at the age of 94. New developments in the Russia probe, as the president's former campaign chairman Paul Manafort is alleged to have lied to investigators. Marriott announces a massive data breach of its Starwood hotel chain which may have impacted up to 500 million people. Plus -- President Trump meets with fellow world leaders at the 2018 G20 Summit in Buenos Aires, Argentina. CBS News Correspondent Bill Rehkopf will have these stories and more on the CBS News Weekend Roundup.