Mikhail Gorbachev was one of the towering figures of the 20th century. Responsible for the dissolution of the Soviet Union, his reforms led to the demise of communism across Europe which helped end the Cold War. His death today was met with tributes from global leaders. Sarah Ferguson interviews Sir Rodric Braithwaite, a former British ambassador to Russia who knew Gorbachev well. | 7.30

History was made in Geneva when President Reagan and Mikhail Gorbachev met in person, highlighting that even nations at odds can embrace dialogue over conflict. Watch Reagan reflect on this pivotal moment. | The Ronald Reagan Presidential Foundation and Institute

President Ronald Reagan and General Secretary Mikhail Gorbachev addressed the citizens of one another's countries about the nature of the holiday season, the treaty between the United States and the Soviet Union and the possibility of a brighter future. Watch this Saturday at 7 PM ET on C-SPAN2 and online at https://www.c-span.org/video/?438898-1/ronald-reagan-mikhail-gorbachev-years-day-messages | American History TV