It appears that US officials have learned are rather confident that the Ukrainian flight that was reported as crashing outside of Tehran, did not actually crash but may have been shot down.
The flight was reported as crashing hours after the Iranian missile attack on US bases in Iraq.
It appears that the anti-aircraft system may have taken down the plane. The plane may have crashed but, it also might have been shot down by a system to protect the Iranian airspace. Things have appeared to have deescalated from the brink of war that was reported shortly after the missile attack started and were concluded as President Trump has opted not to respond militarily to the attack.
This might not help the Iranians win favor with the world though as it was a civilian plane and it appears they may have shot it down outside of their airport.