Pentagon Orders F-35 Jets Grounded

The Pentagon said on Friday that it had grounded all of its stealthy new F-35 fighter jets after an inspection found a crack in a turbine blade in the engine of one of the planes. The suspension of flights comes at an awkward time for the military, which is facing automatic budget cuts that could slow its purchases of the planes. The Pentagon grounded all three versions of the jets — for the Air Force, the Navy and the Marines — on Thursday while it investigated the problem.

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