The Cobalt Bomb Concept from Dr. Strangelove is Back

Cobalt bomb is a salted thermonuclear device jacketed in cobalt-59; at detonation it produces cobalt-60 and blankets regions with long-lived gamma fallout (half-life ~5.27 years). Conceived by Leo Szilard and popularized by Dr. Strangelove, it is designed to contaminate territory for decades, pushing nuclear deterrence beyond MAD toward a doomsday scenario.