Diplomacy is alive again at the United Nations this week. And it's deeply needed. President Obama should make clear to Iran’s President Hasan Rouhani that Iran would be welcome to participate in a conference to discuss an end to the civil war in Syria.
Bashar al-Assad's alleged chemical weapons attack in Syria today will likely raise the volume of calls for American intervention – but also the stakes of such a move. History suggests US intervention in Syria would be unpredictable at best, disastrous at worst.