@ 10:26 UTC : At least we now know this one follows the pattern : out of Africa to Incirlik. The other K35R, going the 'wrong way', has disappeared at least for now.

Is there a secret stash of K35Rs somewhere out there and are they rotating through Incirlik for something like maintenance ?

Update 11/09/2021 : It took off from Incirlik flew to near Cairo in Egypt and returned to UAB, as explained here. The next day it flew back to the US via Constanța.