Summer Friday: The Left's Way Forward; Why Some Young People Carry Guns; Oppenheimer; 'The Sandwich'; Hair Braiding.”

SSP alum Fred Kaplan, Slate's War Stories columnist and the author of many books, including The Bomb: Presidents, Generals, and the Secret History of Nuclear War (Simon & Schuster, 2020), draws on his expertise in nuclear history to discuss whether Christopher Nolan's epic new film Oppenheimer is historically accurate - plus reveals a little-known political controversy within the other big new movie, Barbie.