Turkey tests S-400 with F-16 flights over Ankara’s skies (video-photo) (Upd.)
And they would do the same with the F-35 if they had been delivered...
If Erdogan keeps the S-400, Turkey sanctions Bill will move – US Senate Foreign Relations Committee chairman
"I will work with my colleagues to ensure there is zero chance that F-35s will leave the US for Turkey while Erdogan possesses the S-400"
F-35 program on track to replace Turkey, say Pentagon officials
Trump has not yet decided whether to impose congressional sanctions on Turkey for the S-400 purchase