F135 returns to Arnold for testing in Sea Level facility
Scott Degenhardt, an instrument technician, uses a multimeter while checking equipment in an Arnold Engineering Development Complex Engine Test Facility test cell at Arnold Air Force Base between test runs of an F135 engine. The F135 is undergoing Accelerated Mission Testing in the AEDC facility and is used to power the F-35 Joint Strike Fighter Lightning II. (U.S. Air Force photo by Jill Pickett)(This image was altered by obscuring a badge for security purposes)