Poland was approved to receive 32 Lockheed Martin-made F-35A Lightning II aircraft with support and associated equipment.
The Su-57 fighter came down during a training flight near Komsomolsk-on-Amur.
Some think that getting rid of the old stuff to make room for the new makes sense.
Each of the JSF variants is still coming up short on combat readiness goals, according to the Pentagon's top weapons tester.
Only a few dozen Phantoms remain in active service around the world out of 5,195 built during a 20-year production run.
The U.S. Air Force is taking its mission to connect multiple platforms and battlefields to new heights -- literally.
Some 145 projects could feel the negative affects of an extended continuing resolution, Air Force officials say.
A scaled-down flight exercise will be held instead.
The pilot was able to eject from the aircraft and is being treated at a local hospital, base officials said.
Pratt has been trying to kill the suit since it was first filed, under seal, in 2016.