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“Any offensive is to us objectionable as a reckless escalation” he said. “You add to that, if you use chemical weapons, or create refu­gee flows or attack innocent civilians,” and “the consequences of that are that we will shift our positions and use all of our tools to make it clear that we’ll have to find ways to achieve our goals that are less reliant on the goodwill of the Russians.”

It's all about the natural gas and the flow of it. One plan strengthens Russia's grip on the flow of natural into Europe and the other plan doesn't.....Assad chose option 1. Personally I am not sure Trump wants to fight it out but would if push came to shove, otherwise I think he would just be happy with keeping his promise to his base not to keep digging deeper into the middle east mess and like the migration issues faced here with illegal immigration he'd rather not see more migrating into Europe either, so he decides to sit on it like chess players on a chess board but all the players are stuck where they are at, right now he's like playing Clint Eastwood churning out a go ahead and make my day statement. Less reliant on the goodwill of Russia means not only will you like it that we will sit there so no pipelines go through but you'll be nice and Russia will stop using natural gas to leverage it's power over Europe, otherwise by the time it's all done and over with Europe will have plenty of non-Russian imported gas.