Russian Su-57 fighter jet is a valuable asset for the Russian army. Therefore, the enemy hides it from Ukrainian air defense systems, keeping it at a safe distance, reported Air Force spokesman of the Armed Forces of Ukraine, Illiaa Yevlash. “The Russians have previously used the Su-57 aircraft, but they try to keep it at a considerable distance because it can be targeted by our air defense systems. This aircraft is quite expensive and unique for them, something they cherish. It’s a pricey and unique toy for them,” he said. According to Yevlash, during the recent combined attack on Ukraine on …