[Biggbboattttt]

Interesting point! I think a lot of the secrecy around programs like JUMPSEAT is more about official acknowledgment than actual hidden knowledge so what’s been publicly available for years suddenly becomes ‘news’ once the government confirms it. James Bamford’s work definitely made a lot of this info accessible to the public, so it makes sense that someone could know about it without clearance.

[pseudohadamard]

I've had a quick look and it's mentioned in a number of places, Matthew Aid's "The Secret Sentry" mentions it briefly, Bamford has a page or two in "Body of Secrets", and for honorable mention Jeffrey Richelson's "Wizards of Langley" doesn't have it but does cover the entire KH series across a span of around 250 pages. It may be in a few more books but it'd be a pile to go through.