I saw that in my searches too - the back end "notch" where the exhaust nozzle is seems to be characteristic of engines which have "thrust-vectoring", like earlier posts pointed out the F-35..Posted by findingneo (here)
Hopeless Diamond is similar. I thought it was a spoof so did not mention it earlier on, but it seems it was one that did not turn out but was a genuine Lockheed & Martin design. I wonder if it was one that did not make it past the tests as well?
https://www.google.com.au/search?q=h...zIEeVx4XbkXiM:
In my screen capture :
one can see the "tug" and support frame prior to the lines being painted on the tarmac.
In this image below, the "target" is "moved" into-place, and the rear part of the tug is visible, the support frame apparently under the "target".
I don't believe one would light up an engine outside from under the hangar cover. There would be an amazing amount of thrust to deal with, not to mention, the "tug" would be melted in short order.
Which then leaves one to ponder, why were these items in plain view to satellite recon?
As to "buildings", the buildings appear to be of a rectangular profile, or square profile; these objects being diamond shape resemble the supersonic and hypersonic lifting bodies, or airframes. The "hump" over where the engine would be, visible via satellite and lighting shadows, doesn't appear to be coming from a "typical" rectangular designed building.
The example of building shadows (see the flat roof shadow from the hangar to the left of the "target"...) One can see a straight lined roof-line.
These two objects tho don't seem to meet the regular on-property "building" geometry. Sharp points would be a waste of space, no? They are out of place.
Here is my guess about how they structure the buildings - along square corners. Also are a few other features I think I've identified.