Mood said a no-fly zone should be accompanied by planning for a transition.
"The next thing to argue is incredibly important. It is useless to discuss or to consider a no-fly zone unless you are thinking beyond it, unless you are already then starting to plan."
If the government should quickly collapse, he asks, "what next then?"
He also says the world must look at how international diplomacy can be used to "achieve results with military means that strengthen the moderates inside Syria."
The world must also think about reconstruction after the war is ended and getting humanitarian aid "to the women and children and the suffering Syrian population."