Post date: Wed, 06/09/2021 - 9:22am The Pentagon’s F-35 fighter jet, a revenue mainstay for manufacturer Lockheed Martin Corp. and Pratt & Whitney, is facing pushback over its cost, the greatest in U.S. military history for a weapon system. Two squadrons of the planes are assigned to Eielson Air Force Base in Fairbanks. (Photo/Master Sgt. Darnell T. Cannady/U.S. Air Force/TNS) The Pentagon’s F-35 fighter jet, a revenue mainstay for manufacturer Lockheed Martin Corp. and engine maker Pratt &Whitney, is facing pushback over its $1.7 trillion lifetime cost, the greatest in U.S. military history for a weapons system.