The head of SDI formed the Mars Society with Zubrin. He was originally going to run SpaceX as Chief Engineer (cite: Liftoff) but he instead got appointed NASA admin and directed the first few $billion to a zero-experience SpaceX. This same SDI head then formed something called SDA in 2017 under Trump which is the platform for Golden Dome, or "the SDI 2.0".
This is a multi-trillion dollar program which only Musk has been awarded contracts (as of Nov 2025) and involves the total weaponization of space.
That should concern everyone.