Thursday was the last day of the NATO summit in Washington, celebrating the 75th anniversary of the North Atlantic alliance. 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), joins to recap the event, including a breakdown of President Joe Biden's press conference and what the 2024 election might mean for the future of the alliance.