The T-14 Armata, one of Russia's premier tanks developed for combat, is seen on video while training, sparking ideas about whether it will join combat in Ukraine soon.
The German Aerospace Industry tells Berlin officials that buying F-35s and excluding them from allowing US firms would affect the German arms industry.
Russia's modified Su-57 Felon 5th generation variant installed with a new powerplant could pass more tests, making it an effective fighter when mass-produced.