What this tells me is that the DoD already has "space planes" flying, and perhaps even operational.
Wouldn't doubt it.
Hell, Kelly Johnson's 60's sliderule/technology of the SR-71 damn near got you there way back when. Imagine what the black project types have been able to work on with CAD computers and say 70's/80's technology. We've seen a lot of it in the stealth birds, but I suspect there's a lot we haven't seen too.