F-35A Lightning II's from the 34th Fighter Squadron at Hill Air Force Base, Utah, land at Royal Air Force Lakenheath, England, April 15, 2017. The aircraft arrival marks the first F-35A fighter training deployment to the U.S. European Command area of responsibility or any overseas location as a flying training deployment. (U.S. Air Force photo/Tech. Sgt. Matthew Plew)
Failing F-35 fighter grounded once again

A faulty engine caused the $1.7 trillion boondoggle fighter to crash during a December quality check.

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