James Hershberg, a Cold War historian, rates Cold War scenes in movies based on their realism. He separates fact from fiction regarding the nuclear arms race and atomic secrets depicted in Christopher Nolan's "Oppenheimer" (2023), starring Cillian Murphy, Robert Downey Jr., Florence Pugh, and Emily Blunt. Hershberg also explains the details of the Cold War's proxy wars, shown in "WarGames" (1983), with Matthew Broderick. Hershberg is a professor of history and international affairs at George Was