The skies over Fort Worth, Texas, hosted a historic aviation milestone today when the most expensive plane on Earth—a modded version of the F-35 Lightning II that lands vertically like a helicopter—made its first flight. Its pilot certainly had the chops to do the job: He learned to fly short take-off/vertical landing (STOVL) airplanes when Jimmy Carter was president. Retired Royal Air Force squadron leader Graham Tomlinson, now employed by BAE Flight Systems, flew AV-8 Harriers (the first STOVL warplanes to see action) for 28 years, including time in the late 1980s as a test pilot qualifying the FA-2 Sea...