North Korea Designed a Nuke. So Did This Truck Driver

John Coster-Mullen has reverse-engineered America’s first nuclear weapons and has self-published a book on his findings. Meredith Rizzo/NPR hide caption toggle caption Meredith Rizzo/NPR John Coster-Mullen has reverse-engineered America’s first nuclear weapons and has self-published a book on his findings. Meredith Rizzo/NPR This year, deep inside a mountain, North Korea detonated a giant nuclear bomb….