my understanding is that S-400 can work on various frequencies and infra-red up to 250 miles away. hard to jam.

They will sell everything to China.

Robust, you would be absolutely right had it been independently confirmed - say by Americans - that the Russian Su-24 actually entered Turkey. That has yet to occur and actually, may never occur because it is very possible that SU-24 never entered Turkish territory. Include this version in your next comprehensive…