A Pratt & Whitney F-135 engine for the conventional takeoff and landing version of the F-35 Lighting II Joint Strike Fighter undergoes proof testing at Arnold Air Force Base.
Photo by Contributed Photo /Chattanooga Times Free Press .
published Sunday, February 9th, 2014
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The next time you hear a sonic boom and spy one of the latest U.S. military jets streaking across the sky, you can give a little credit to some folks in Tullahoma, Tenn.