Editor's Note: This story has been updated to reflect the fact that the $8.3 million price jump for the Joint Strike Fighter's F135 engine is in fiscal year 2002 dollars. FORT WORTH, TX, -- The price of the Joint Strike Fighter's Pratt & Whitney-built F135 engine has jumped to $8.3 million apiece thanks to a high percentage of engines that have to be scrapped on the production line, and the company needs to "do better," the JSF program manager said...