F-35 Debut Hobbled by Flawed Software, Pentagon Tester Finds

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Flawed software will hobble the first of Lockheed Martin Corp.’s F-35 fighters to be called combat-ready, limiting the plane’s ability to drop bombs, share data with other aircraft and track enemy radar, the Defense Department’s chief weapons tester found.

The Marine Corps plans to declare its version of the F-35, the costliest U.S. weapons system, ready for limited combat as soon as July. Software essential to delivering on the plane’s promised capabilities may complete flight testing next month, about four months late.