Idris Elba narrates docuseries 'Erased: WW2's Heroes of Color'
Idris Elba has a strong connection to World War II. His grandfather fought in the war. Stories like his family's intrigued the actor and producer to dig deeper and reveal the long-lost legacies of soldiers of color in a new project for National Geographic, "Erased: World War 2'S Heroes of Color."