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The missiles are designed, built, and installed by the contractor. They are managed, operated, and controlled by the USER. USAF.

Over a 50 year life. With very strenuous time to launch requirements. By staff that is well trained, but not well experienced.

An ICBM is a lot different that putting a payload in orbit. Needs to sit for 10 years, with 21 year old technicians performing the maintenance. And then launch when desired, on short notice, perhaps with portions of the support systems inoperative.