Are US Attacks On Syria Rehearsals ???

Here is a discussion of how Russia may defend Syria against future US attacks:

https://sputniknews.com/middleeast/201704091052462296-russian-syria-air-defense-upgrade/

I believe the initial and future US attacks on Syria (were and) are being conducted to probe and test Russian air defense systems to detect their weaknesses and to determine how to defeat them. The information gleaned from such tests then will be used in the final US first strike assault on Russia itself.

It's the Spanish Civil War of 1936 all over again, with the US in the role played by the Germans in that conflict.