"All things considered, we are, and have been hearing a tremendous amount of information about what is clearly a highly classified program, coming from the contractor directly no less. This is highly peculiar. And parts of this technology have been in the works for decades. The "combined cycle" propulsion system capable of taking an aircraft from sitting on the runway well through mach five has been in development since at least the mid 2000s by Lockheed and its partner on the project Aerojet Rocketdyne. Additionally, past hypersonic vehicle tests by the USAF have also garnered valuable insights into this extreme flight environment, and there are likely many other major breakthroughs gained over the years from programs we know nothing about.

So why are we getting bread crumb trails dropped to Aviation Week periodically as to the maturity of the technology and the program? Doing so seems like a very strange move considering we don't even hear a peep about far less exotic technological developments—like the existence of advanced unmanned combat air vehicles for instance.

I would posit that it is very possible the Skunk Works and its USAF partners are actually farther along in the SR-72's development than they let on. Possibly even past the point of a small demonstrator, and already fielding a full-size prototype, or even an operational capability. In other words, what we may be hearing about are post-dated echoes of the program's past. The only other reason as to why Lockheed would be so willing to blabber about their hypersonic flying unicorn is that they need money from Uncle Sam to fund it. But that seems unlikely as it is highly doubtful the company has funded the concept's development for over a decade on its own, beyond a relatively small amount of money granted by NASA to explore the technology. In fact, Weiss says that Lockheed is not alone on the project in any way in his latest statement, noting that "DARPA and the services" are directly involved."

...Considering how competent Lockheed and their Air Force colleagues are at keeping secrets, the SR-72's strange "gray world" existence makes little sense. And hey, something has to live in that huge new remote hangar at Area 51 right? Maybe that facility's tenant is the aircraft being described still as a "paper concept" here today.

In the end, I would suggest being open to taking SR-72 related news as more of an indication of what is, instead of what could be."