For millions of people in South Korea and Japan, dawn broke early on Sunday, March 22. More than thirty-one North Korean nuclear weapons, lifted into space on ballistic missiles, now fell silently back to earth through the night sky before suddenly igniting the day—first with flashes, each brighter than a thousand suns, and then with spontaneous fires that in some cases grew into firestorms. These conflagrations swept through the cities and towns of South Korea and Japan, burning brightly enough to keep the darkness at bay for days.