Bottom of the ocean. Better yet, recycling plant.

I mention the space industry because there's a lot of overlap between that and the defense industrial complex in engineering terms. NRO had a couple hubble-sized telescopes laying around they built and didn't use. USAF has their own space shuttle. They're currently planning to update all of our ICBMs. They could move other payloads to orbit. We don't even need ICBMs, with submarine-launched missiles, even the new ones will be obsolete bulls-eyes for nukes in the midwest.