If they’re talking about retiring this..., the the story gains credence. If they’re talking about it coming on line, it’s more or less laughable.
Lockheed doesn’t leak. We don’t know that the hell they have until they retire it. Mach 6 sounds about right, again, if you’re talking about the SR-71 replacement.
It’s replacement should be in the range of Mach 10-12.
I’m afraid you’re living fifty years in the past.
The leakproof lockheed doesn’t exist anymore, neither does the loyal president or even the loyal military.
Anything that needs an air breathing propulsion system cannot be called a “space vehicle” of any magnitude. If it’s breathing air, it’s still in the atmosphere!!!
Considering that it has been 50+ years since their inception it might be possible that it could go into LEO.