http://foxtrotalpha.jalopnik.com/is-this-proof-that-the-us-air-force-can-aerially-refuel-1702048915
The RQ-170 Sentinel went from “Beast of Kandahar” enigma to Bin Laden-catching fame to crashing into Iranian hands, all in about half a decade. Since then, there have been few photos and little official talk as to its existence. Yet these pictures may prove that the RQ-170, or an enhanced version of it, is capable of aerial refueling.
These images, obtained from a source that wishes to remain anonymous (and one that I would rate as good), show what appears to be the semi-autonomous (flown in a point and click manner from a desktop-like interface or totally on autopilot) RQ-170 or similar craft moving into pre-contact position behind an aerial tanker. The source also relayed to me that these photos were shot before the tanker plugged into the jet and started feeding it gas.