Two MC-130P Combat Shadow tanker aircraft from the 129th Rescue Wing, Moffett Federal Airfield, Calif., taxi on the Moffett flightline. A test version of the communication format called Situation Awareness Data Link, or SADL, was recently installed and evaluated on a 129th MC-130P Combat Shadow tanker. (U.S. Air Force photo by Master Sgt. Daniel Kacir)