Steve James is a documentary filmmaker whose body of work has taken him from "Hoop Dreams" to the 2008 financial crisis and more. His latest film, "A Compassionate Spy," is about Ted Hall, a physicist who worked at Los Alamos during World War II and helped develop the atomic bomb. You may have heard something or other about the bomb lately, with Christopher Nolan’s "Oppenheimer" in theaters now and creating buzz by the gallons. Hall’s story is just as important. He took what he learned at Los Alamos and shared it with the Soviet Union, an action that continues to reverberate. Learn more about your ad choices. Visit megaphone.fm/adchoices