In the latest blow to Russia’s military prestige, Ukraine this week claimed to have for the first time struck at least one – and possibly two – of Moscow’s cutting-edge, fifth-generation fighter jets, the Su-57. The aircraft were reportedly damaged after a strike on the Akhtubinsk airfield in the Astrakhan region in southern Russia, 589 kilometers from the front line. The plane is Russia’s most modern fighter jet with only a few units in service in the Russian Air Force. What does Russia say about the Su-57?In an article last year, Russian propaganda media outlet Sputnik gushed about the plane…