The Air Force is about halfway through its first year of formal programmed depot maintenance on the 1960s-era intercontinental ballistic missile fleet, as the service continues its effort to replace the land-based nuclear weapons into the 2030s. Fiscal year 2017 marks the start of an eight-year PDM effort across the entire Minuteman III weapon system, including the launch facility, launch control center, three stages of missile boosters and the propulsion system rocket engine. For launch facilities and control centers, Air...