Iranian Claimed 2 years ago to have launched a 5th gen fighter program called F313, then nothing especially after people looked over the photos and found the huge flaws like a Painted on Fighter display, Intakes to small to work, No Exhaust Nozzle, and that the cockpit was to small for an adult sized human to sit in with the Canopy closed. so what happened then? a release of obviously photoshopped images, video of a flying model airplane then 2 years of nothing.
until earlier this week then this "Taxi test" was posted and claims of production.