In a planet within our solar system, the US Government with the help of a private space industry discovers a really special cool McGuffin mineral. It is super shiny. However, the US Government doesn't want to let everyone know about it and so instills the ____ Agency to go keep it secret with guards, concealment, and checkpoints around the deposit.
The US was given permission by the UN to set up a colonization effort on the planet, as a reason for the US installations already being on the planet and to avoid a war.
What US Government Agency would handle something like this?
This is near-future, ~40 years ahead of current time.
The Outer Space Treaty (1967) is largely ignored at this point in time. The US, the US's private space industries, and the ESA are the only entities capable of going to the planet. The ESA is complicit in the actions of the US.
In my own research I found the BLM (Bureau of Land Management), which might work, however if nothing else fits, I may have to make an imaginary one.