It is between US and Turkey. Iran doesn't have a say in Syria. Iran doesn't get affected by 4 million refugees. Turkey is feeding Syrian people while Iranians pretend to care about Syrians. All Iran is funding is Assad to kill more Syrians. Iran needs to change its behavior otherwise there will never be a deal with Iran. Turkey/US agreed upon no-fly zone. What is Iran going to do? LOL
I know Turkey is heavily affected. Believe me, some parts of Istanbul aren't even recognizable anymore. That being said, sadly Iran also has war on it's borders, so it isn't some far away nation that can just play a game. And Iran IS heavily invested in Syria, because it supports the current GOVERNMENT. We can agree about whom we support, but Iran does have a role to play, and it does have a role in the eventual outcome. Those no fly zone BS talks have been there for 4 years. Nothing has come of it. I'm not holding my breath. The point is, the nuclear negotiations probably also mean an agreed partitioning of Syria, or at least a federalization. That no fly zone is to strike ISIS. At least that's what the US says. Iran doesn't have a say in Syria, that's just ignorant, sorry to say.