Pentagon urges safety valve for F-35 to help jet survive attack

The Pentagon’s top weapons buyer is backing calls to restore a valve on Lockheed Martin’s F-35 jet that improves the fighter’s chances to survive a hit from a high-explosive round. Adding an improved valve “would result in the aircraft being fully compliant” with its operational requirements, Frank Kendall, the undersecretary for acquisition, wrote a lawmaker last month in a previously undisclosed letter.

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