https://www.theregister.co.uk/2018/04/13/f35_flight_tests_finished_delivery_pause/

The F-35 fighter jet has completed one of its years-long flight testing programmes – just in time for the United States to suspend all deliveries of the new supersonic aircraft.

The final flight of the F-35's System Development and Demonstration (SDD) phase took place earlier this week, flown by British BAE Systems test pilot Pete “Wizzer” Wilson. He flew an F-35C (the version designed for conventional aircraft carriers) on a flight intended to check that the aircraft can safely carry 2,000lb bombs and Sidewinder anti-aircraft missiles together.