Sathnam Sanghera's new book, Empireland, focuses on how British imperialism shaped the trajectory of that country's history. But as he emphasizes in his opening chapter, the U.S. – much like the rest of the world – is not exempt from being a part of that story. In today's episode, Sanghera speaks with NPR's Scott Simon about how he came to understand that fraught history through his own personal experiences as a Sikh man in Britain, and why that particular empire stands out from the rest for him.