( Editor's note: This story has been updated to include a statement from a Missile Defense Agency spokesman.) The Defense Department believes it can increase the inventory of Ground-based Interceptors by integrating existing components with new hardware acquired through the Ground-based Midcourse Defense (GMD) Service Life Extension Program (SLEP), giving U.S. commanders more than 44 guided missiles to counter North Korean intercontinental ballistic missiles. Two senior U.S. military officials disclosed this development in recent weeks, which along with an...