Minot Air Force Base, North Dakota, is in line for a nuclear-sized upgrade as the Department of Defense plans to update its nuclear deterrence capability.
The LGM-35A Sentinel nuclear missile has seen its costs increase at least 37%, triggering a review that could see the program restructured or canceled.
Documents show the risks toxic substances posed in the underground capsules and silos where Air Force nuclear missile crews have worked since the 1960s.