F-35 program accelerating, at 'pivot point,' program chief tells Congress
An F-35A Lightning II taxies from the runway onto the flightline after successfully completing a sortie Dec. 14, 2015, at Luke Air Force Base, Ariz. The F-35 is being adopted internationally by eight partner nations, including Norway, Italy and Australia. (U.S. Air Force photo/Airman 1st Class Ridge Shan)