At a recent event hosted by the Missile Defense Advocacy, Under Secretary of Defense for Research and Engineering Mike Griffin calculated the cost to “put up” an interceptor layer… The National Academies study concluded that the life cycle costs for even an “austere and limited-capability” set of 650 satellites would be at least $300 billion in 2010 dollars, or 10 times more expensive than other missile defense options they examined. This estimate included the costs that Griffin did not, which are clearly substantial. – Union of Concerned Scientists