SR72, is it actually a thing now?

[Trevatanus]

This article seems to think so, and it sounds like it not being denied either.
I find the content of this article surprising though, is it not usually standard for these things to be admitted to much later down the track?
http://www.popularmechanics.com/military/aviation/...

[Eric Mc]

Lots of concepts are tested, often using smaller scale models. That doesn't always mean that a full size operational aircraft will end up being produced.

The US Air Forces X-37 spaceplane is a good example. It may, or it may not, lead to a larger craft based on its principles.