Blue-ribbon panelists of the National Academy of Sciences (NAS) recommended Friday that American submarines have a few conventional arrows in their nuclear weapons quiver for special circumstances.
Presently, for example, the only immediate military response, for taking out a missile about to fire a nuclear weapon at the United States or one of its allies, is with a delivery system carrying a nuclear weapon.
That may not always be the best choice, the committee decided, depending on the situation.