Switching from the Minuteman III to the Sentinel system, led by Northrop Grumman, involves the replacement of more than 600 facilities across five states.
The LGM-35A Sentinel has run into severe cost overruns and schedule delays that could force the Air Force to keep Minuteman IIIs operational years longer.
The Air Force must continue maintaining Minuteman III nuclear missiles longer than expected, with the Sentinel successor requiring a major restructuring.
