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The National Nuclear Security Administration could probably whip up a new low-yield warhead for submarine-launched ballistic missiles in “a couple years,” but doing so would slow ongoing programs to extend the life of current U.S. warheads, a former National Security Council official said Tuesday.“That’s something that the laboratories probably effectuate in a relatively short period of time, a couple of years,” Jon Wolfsthal, senior director for arms control and nonproliferation in the Obama administration’s NSC, said at a press event…
