Even before its first fifth-generation stealth fighter completes development, Russia has embarked on developing sixth and even seventh-generation follow-ons to the Sukhoi T-50 PAK-FA. Indeed, Sukhoi has already presented initial concepts for a new sixth-generation fighter to the Russian government.
MOSCOW — President Vladimir V. Putin of Russia and his Turkish counterpart, Recep Tayyip Erdogan, are expected to reconsider their dispute