The UN Security Council:
The UN Security Council has five permanent members: China, France, Russia, The UK, and The U.S.
It does have other members, however, they don't really count, because they don't have veto power. And that's where today's vote gets interesting.
The Vote:
It's guaranteed the The UK, U.S., and France will vote "yes" on the no-fly zone. China and Russia have reasons not to.
* Russia and Libya traditionally have a strong relationship, but lately that has been deteriorating over the issue of Qaddafi's use of force against his own people. On March 10, Russia banned arms sales to Libya. Russia is opposed to any ground invasion of Libya, which may be necessary to create a no-fly zone. Russia is likely a "yes," or abstention.
* China's oil companies are preparing to restart operations in Libya. It doesn't want any interference in Libya's domestic affairs which is pretty much Chinese policy for every country outside its sphere of influence. Count China as a "no," or, at best, an abstention.