I'm conflicted about the prospect of a no fly zone over Libya. Leaving aside the hypocrisy of the U.S. pursuing such a policy while it tacitly supports Saudi Arabia's suppression of protesters in Bahrain---which is irrelevant as far as Libyans are concerned---what does it mean to take sides in a Civil War? A "no fly zone," after all, requires at least the destruction of air bases and anti-aircraft installations before it can commence. It's war.
But.. that said, it is immensely gratifying to see that this U.S. administration takes it for granted that any decision to enforce a no fly zone must be preceded by Chapter VII resolution from the UN Security Council and that key regional players, importantly the Arab League, not NATO, need to be on board first. This is an important step toward getting basic norms of multilateralism and obedience of international law back into the bloodstream of U.S. foreign policy.