'Almost certain' Sukhoi Su-57 fighter being used on missions in Ukraine, UK says
5th generation fighter jet, however, would only fly over Russian territory launching air-to-air and air-to-surface missiles
Felon
Algeria may have acquired 14 Sukhoi Su-57 fighters, according to rumors
Agreement, however, has not been confirmed by countries and by UAC, the aircraft manufacturer. African air force is traditional customer of Russian fighter jets
Russian stealth fighter Su-57 has first unit lost in accident
Sukhoi aircraft had problems during test flight; pilot successfully eject