Sentinel nuclear missiles will need new silos, Air Force says

The Air Force will have to dig entirely new nuclear missile silos for the LGM-35A Sentinel, creating another complication for a troubled program that is already facing future cost and schedule overruns.

The Air Force originally hoped the existing silos that have housed Minuteman III intercontinental ballistic missiles could be adapted to launch Sentinel missiles, which would be more efficient than digging entirely new silos.