F-35 manufacturer Lockheed Martin has failed to deliver regular upgrades for the aircraft—and its most recent upgrade package was implemented disastrously, according to an internal Pentagon report.
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Why the F-35 was banned from flying near lightning

The F-35 was built to survive in some of the most dangerous combat environments on Earth, yet for years the most advanced version of the jet faced a surprising restriction: it could not fly near ...
F-35 TR-3 software upgrades stalled in testing, delaying new combat capability and raising cybersecurity concerns.