"Stephen "FPilot" Bierce" wrote in message
...
Last week I saw a C-17 Globemaster III making some strange low-altitude
maneuvers around Morristown, Tennessee (which I've noticed has been used
as a
practice visual target area before).

I'm wondering if the Air Force has already developed a gunship version of
the
C-17. Those quieter fan engines are probably an advantage to the C-130's
props,
which can often be heard from miles away.

Not likely. The C-17 is just plain too big and too useful
moving freight around.
More likely the C-17 you saw was just practicing some
kind of low level stuff.