After a prolonged battery of testing and evaluation, the US Armed Forces determined that the latest fleetwide upgrade to the flagship Joint Strike Fighter stealth aircraft has failed to deliver any new combat capabilities. In 2024, Lockheed Martin upgraded the fleet of 5th-generation F-35 Lightning II fighter jets with the technology refresh 3 software package. Published in March 2026, the 2025 report from the Director of Operational Test and Evaluation does not expect full capability until 2031.
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