For the security of whole world Green Movement should wake up in Iran and topple the regime of mullahas. It's best way to keep peace in this region of the world. But life is not so simple, so probably military option will be the only choice to stop Iranian terror, because Russia and China don't want to be responsible and agree on crippling sanctions on Iran. This sanctions could topple the regime but Russians want to have the market for their waepons and technologies, and Chinese just don't want to interrupt flow of iranian oil. So peace in this region of the world is danger because greedy people.
U.S. says working on initiative to de-escalate Syria fighting, with focus on Aleppo (Reuters)