Second guessing myself, that is either an old 141 with forward fuse
missing or a steel mockup used for fire training. I'm leaning toward
mockup as the engine nacelles are not placed right for C141 or C17.
It's something they can torch again and again without destroying it.
The inner round circle is probably a gravel burn pit with a berm around
it. The asphalt is just for jockeying the fire suppression equipment.

The 57 is probably used for battle damage repair exercising. Chop a
few holes with an fire axe and let the repair guys patch it. We had an
F106 at Incirlik for this for a number of years. It was finally
destroyed by EOD blowing it to pieces and then buried in the base
burial pit not far from a C-130 burial site.

Frank Whiteley