NATO supplied them with Stingers which can be used only against low level flying airplanes. What keeps Russians from gaining air supremacy are numerous S-300 an

NATO supplied them with Stingers which can be used only against low level flying airplanes. What keeps Russians from gaining air supremacy are numerous S-300 and Buk batteries that make flying Su-25 or Su-34 outside of Stinger range very dangerous so Russians almost don't fly that high at all.