180410-N-ZB537-018 PATUXENT RIVER, Md. (April 10, 2018) Lt. Cmdr. Chris Tabert, assigned to Air Test and Evaluation Squadron (VX) 23, pilots Navy F-35C test aircraft during an external GBU-31 flutter and flying qualities test flight from Naval Air Station Patuxent River, Md. (U.S. Navy photo by Dane Wiedmann/Released)