Russia is scared to fly its best jets over Ukraine in case they're shot down and NATO gets hold of the wreckage, expert says

Russia is avoiding flying its advanced combat jets over Ukraine for fear of the wreckage from a crash giving away the plane's secrets, an expert told Insider. The Sukhoi Su-57, a modern Russian aircraft prized for its stealth, has not been a regular feature of the war so far, despite Moscow's efforts to hype its capabilities.

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