It may already be in use elsewhere.
The drone project went public when it was leaked a design was approved for a prototype. The Air Force denies it was ever built, but rumors persist of testing being done out of Wright Patterson.
The Air Force does not deny Globalhawks flew out of there in 2008, but claims that drone program was testing the drones use for weather tracking.
The argument goes that the minimal shielding requirements of the drone, no humans on board, made it the perfect proof of concept platform.
This is part of the Air Forces green plans to get away from using oil based fuel.
Other services may be doing parallel testing in other platforms.
