Bulletin of the Atomic Scientists

Since last fall, Air Force Gen. Kevin Chilton, commander of U.S. Strategic Command, has been stumping for the so-called Reliable Replacement Warhead (RRW) Program, which would develop new nuclear warheads to swap into the U.S. arsenal. In a sit-down with Wall Street Journal editors last November, Chilton held aloft a prop to make his case: "I remember what these things were for. I bet you don't. It's a vacuum tube. My father used to take these out of the television… more

Nuclear deterrence is a rather subjective concept: How many weapons are enough to ensure deterrence? How difficult is it to achieve and maintain deterrence? How important are the technical details of a country’s nuclear forces, such as the size, configuration, and readiness, to the goal of maintaining deterrence? The answers to these questions vary across recent history and across geographic areas.

One view, I would say the dominant view in U.S. defense planning, is that deterrence can be achieved only through… more