it had huge natural overlap with hypersonic maneuverable reentry vehicle R&D which has been all the rage, at least in the Russian weapon program, in the last co

it had huge natural overlap with hypersonic maneuverable reentry vehicle R&D which has been all the rage, at least in the Russian weapon program, in the last couple decades, so a lot of Kliper programs would be highly classified. Also, while being no weapons by design, there are several USSR satellites in the parking orbits carrying tens of kg of highly enriched uranium.