A U.S. Marine Corps F-35B from Air Test and Evaluation Squadron 23 (VX-23), Naval Air Station Patuxent River, Maryland, undergoes a ground test of an improved probe light assembly in an Edwards Air Force Base hangar Feb. 28. The F-35 program recently completed testing on an improved lighting assembly with the KC-135 Stratotanker that will enable the Navy and Marine Corps F-35 variants to refuel behind the tanker at night. Flight testing of the redesigned light, which attaches to a refueling probe, was led by Patuxent River Naval Air Station, Maryland, and supported by Edwards Air Force Base, California. (Courtesy photo by Jonathan Case/Lockheed Martin)