“A United Kingdom” – Effective love stories stir emotion.  Effective historical dramas help enlighten. In a recent interview, David Oyelowo (“Selma” (2014), “A Most Violent Year” (2014)) said that after reading the book “Colour Bar: The Triumph of Seretse Khama and His Nation”, he wanted to play Seretse Khama on the big screen and then [...]