The F-35C Lightning II designated CF-2 completed the final system development and demonstration flight at Naval Air Station Patuxent River, Md., April 11, 2018. The aircraft, assigned to the F-35 Pax River Integrated Test Force, completed a mission to collect loads data while carrying external 2,000-pound GBU-31 Joint Direct Attack Munitions and AIM-9X Sidewinder heat-seeking missiles. Navy photo