Putin hosts Iran, Turkey leaders in major new Syria diplomacy push

By Denis Pinchuk and Stephen KalinSOCHI, Russia/RIYADH (Reuters) - Russia's Vladimir Putin hosted the presidents of Turkey and Iran to discuss Syria on Wednesday, launching a major diplomatic push to finally end a civil war that has been all but won by the government of President Bashar al-Assad.Syrian opposition groups, meeting in Saudi Arabia to seek a unified position ahead of peace talks, decided to stick to their demand that Assad leave power, Al Arabiya television reported, following specu