These folks have been providing air-to-air refueling for Navy/Marine aircraft for years (but not in combat zones that I know of). Looks like they just added a KC-10 to their fleet.

I say it's for real. Not a whole lot different than contract aircraft (World, Omni, Polar, Atlas, Gemini, etc.) transporting troops and cargo into/out of the theater. They are all operating in/transiting through "combat airspace."

Omega Air Refueling