The estimated price tag to develop the Air Force's new intercontinental ballistic missile is now $21.7 billion -- a 20 percent jump compared to the service's estimate last year -- a revision that comes after Northrop Grumman and Boeing were tapped last summer to develop prototypes for a Minuteman III replacement. The Air Force's FY-19 budget request for the Ground-Based Strategic Deterrent program seeks $345 million as part of a down payment on $8 billion across the service's new five-year...
