Pratt & Whitney says its ground-test F-35 Joint Strike Fighter engines have logged more than 4,000 system development and demonstration hours. The F135 jet engine is slated to power the F-35 in flight tests to begin next year.
The Air Force in October carried out a homeland defense mission, with jets including F-16 Fighting Falcons, in Alaska’s remote Aleutian Islands to show a base there could safeguard the northern regions.