
LOS ALAMOS, N.M. – By December 2024, the Los Alamos National Laboratory will produce a proof-of-concept pit for a new intercontinental ballistic missile warhead, a senior lab official said here Thursday during an extremely rare media tour of the building where workers will cast the weapon’s plutonium core. That pit will not go into one of the hundreds of W87-1 warheads the Department of Energy’s National Nuclear Security Administration (NNSA) is set to build for the Sentinel missiles the Air…