The Shadowy Story of Oppenheimer and Congress

Nominations for the Oscars are announced on Tuesday and “Oppenheimer,” a film about the father of the atomic bomb, is expected to be among the front-runners. Catie Edmondson, a congressional correspondent for The Times, explains how the film sent her on a quest to find the secret story of how Congress paid for the bomb, and what it reveals about the inner workings of Washington.