The language on the board appears to be german (I'm crap at languages). It is HIGHLY unlikely that germany would have such a substantial secret
project.
Also, look at the numerous people milling around it -it must be a well kept secret if it's real.
Just a thought, but maybe a mock up of some kind. Or a fake.
It is a doctored photo. Was discussed here on ATS quite a while ago. Did a quick search and couldn't find the thread, but someone eventually found
the real picture and it was a regular jet in the hanger...the fake was doctored and the triangle added it.
This was an artist's rendition of the ATB stealth bomber project that spawned the B-2.
This image was used on the cover of the February 1986 Discover magazine.