I thought the F-35 has already flown.
Sure, with Lockheed test pilots. This is the first flight by a government pilot.
LCDR Greg Fence Fenton, USN, MAJ Art Turbo Tomassetti, USMC, LCDR Brian Goz Goszkowicz, USN and Sqd. Ldr. Justin Paines (UK Royal Air Force). .
Tomassetti was also the first pilot to fly the X-35A, B and C.