Russia to upgrade four Su-27s to Su-35s

Russia will take delivery of 10 new Su-35s this year and four Su-27s will be upgraded to the Su-35 configuration, Russian Deputy Defense Minister Yury Borisov disclosed during a visit to the Komsomolsk-on-Amur plant.

By Dmitry Terekhov from Odintsovo, Russian Federation (Sukhoi Su-35S) [CC BY-SA 2.0], via Wikimedia Commons