[Defender3]

I don't know what that object is. Inside the fenceline was cluttered with building supplies left over from the rennovation, as well as the trailer. That object could be some kind of building material. It's too small to be an aircraft engine, if that's where you were heading.

[RangeRatt]

leftover ductwork from the (then) on-going renovation of the Pentagon? Just a thought....