I just read this piece of news:
... the American plane took off from a carrier (George HW Bush), flew over all of Russia's radar and missile sites in western Syria, shot down the Syrian Su-22 in Raqqa, and then flew right back over all the Russian anti-air sites.
The reason Americans could do so without any worries is because having announced the flight to the Russians through the deconfliction channel (but not their intention to be shooting down Syrian jets without trying to contact the Russians again) the Russians were honor-bound to not molest the US plane.
But they don't really cite any sources, so I don't know how to assess whether it's actually true.
Is this actually true or is it fake news?