The Receiver Simulation Tool sits behind a KC-10 Extender aerial refueler on the Edwards flightline earlier this year. The RST is a ground-based system designed to simulate events that happen during aerial refueling between receiver aircraft and new tankers such as the KC-46 Pegasus, Australian KC-30 and Italian 767. The team has been testing the RST with legacy tankers such as the KC-10 and KC-135 to get baseline data before testing on the new aerial refuelers. (U.S. Air Force photo by Brad White)