tunnels
It's a virtual certainty there are human breeding/cloning centers in underground bases.
It's not too much of a stretch to think that Antarctica also has a fair amount of this going on.
I would not even be surprised if there was some of this occurring, including hybridizing members of teh species homo sapiens with members of other species, off-planet, to create beings better suited to those planetary/lunar environments.
…which may have been part of POTUS's rationale for establishing the Space Force.
Space Force is probably at least in part an effort to reign in rogue space programs that were/are being conducted under the auspices of the US Space Command, US Geospatial Agency, NRO, Navy Space Command, Air Force Space Command, etc.
The hybridization stuff has been going on for decades but, like anons are mentioning, it has to be done far from prying eyes. So off-planet bases and those deep underground (Pine Gap, US Desert Southwest, Antarctica, Canadian Tundra…) make the most sense.
This is part of what Q said would put most people in the hospital / The ending isn't for everyone.
Agreed, important parts of the takedown of the cabal are happening deep under our feet and they aren't as visible as the drama of subpoenas, SC cases, sealed indictments, etc.
Yet the underground war is part and parcel of the Q story nonetheless.
Underground/undersea bases (either belonging to the DS, or belonging to those with whom the DS wants to monopolize business) are probably also a big part of the disputes in the South China Sea, Falklands, and elsewhere.
Mel Fabregas is from Puerto Rico and familiar with the undersea bases near that island.
Mel has done a good job IMO of going deep down the rabbit hole without going off the deep end.