According to the US Defence Secretary James Mattis, the American missile attacks destroyed 20% of the active aircraft in the possession of the Syrian Air Force. I know that the ISIS and the Al Qaeda will be rejoicing at this news.
The destroyed aircraft include six Russian-made MiG-23.
Is it the planes? The MiG 23 was put on the wing in 1969. It's junk. It seems to me that missiles were more expensive than the damage which they have caused Assad.