[notthegov]

Perhaps but the JASON Group is the most famous group of top secret scientists. Half of their studies are classified but here's some that aren't-

https://fas.org/irp/agency/dod/jason

JASON was founded as Project 137 by John Archibald Wheeler and others. It was only publicly confirmed to exist after the Pentagon Papers mentioned them.

[pontifier]

Thanks, I'm particularly interested in their evaluation of low cost Fusion concepts. I really wish I could get some funding to build my prototype reactor.