Russian President Vladimir Putin was one of the first politicians to congratulate Donald Trump on his election as president of the United States in 2016, but over time the relationship between the two heads of state has had its ups and downs. Are they friends or enemies? Has their mutual admiration turned into mutual distrust?

Frenemies: Putin and Trump

Wallis Simpson, an ambitious American, seduces the King of England who abdicates to pursue his love for this woman.

Wallis Simpson, Loved and Lost

The complex relationship between royal brothers Edward VIII and George VI, who were both at the heart of the infamous abdication crisis of 1936, is the subject of this excellent documentary. From British Pathé TV's Royalty Collection.

Edward & George: Two Brothers, One Throne

Lyndon B. Johnson: Succeeding Kennedy presents and explores the legacy left behind by this political force.