America’s $400 Billion Stealth Jet Fleet Is Grounded Plagued by delays and cost overruns that turned it into the most expensive weapons program in history, the F-35 program is on hold after a fire nearly destroyed a plane. The U.S. Air Force has grounded its fleet of stealthy Lockheed Martin F-35 Joint Strike Fighters (JSF) after one aircraft caught fire on takeoff Monday at Eglin Air Force Base in Florida. While the pilot got out of the stricken jet without injury, the roughly $200 million machine could be a total loss. “The airplane aborted during takeoff due to a fire...