The head of the U.S. military's nuclear strike forces believes the time has come to consider re-outfitting Minuteman III missiles with more than one warhead, a move that could roll back arms control measures that removed two of the three multiple independent targetable reentry vehicles (MIRVs) that were originally emplaced across the ICBM fleet. Gen. Anthony Cotton, head of U.S. Strategic Command, said this change in policy, along with “uploading” today’s Navy and Air Force intercontinental missiles to carry additional...