To my considerable surprise, the UN Security Council has just 
approved a no-fly zone in Libya, which would also permit air strikes on Libyan military defenses.
The United Nations Security Council approved a measure on Thursday authorizing “all necessary measures” to  protect Libyan civilians from harm at the hands of forces loyal to  Colonel Muammar el-Qaddafi.      
The measure allows not only a no-fly zone but effectively any  measures short of a ground invasion to halt attacks that might result in  civilian fatalities. It comes as Colonel Qaddafi warned residents of  Benghazi, Libya, the rebel capital, that an attack was imminent and  promised lenient treatment for those who offered no resistance.         “We are coming tonight,” Colonel Qaddafi said. “You will come out from  inside. Prepare yourselves from tonight. We will find you in your  closets.”        
 Speaking on a call-in radio show, he promised amnesty for those “who  throw their weapons away” but “no mercy or compassion” for those who  fight. Explosions were heard in Benghazi early Friday, unnerving  residents there,  Agence-France Presse reported.        
 The United States, originally leery of any military involvement in  Libya, became a strong proponent of the resolution, particularly after  the Arab League approved a no-fly zone, something that Secretary of State Hillary Rodham Clinton called a “game changer”        
  With the recent advances made by pro-Qaddafi forces in the east, there  was a growing consensus in the Obama administration that imposing a  no-fly zone by itself would no longer make much of a difference and that  there was a need for  more aggressive airstrikes that would make  targets of Colonel Qaddafi’s tanks and heavy artillery — an option  sometimes referred to as a no-drive zone. The United States or its  allies might also send military personnel to advise and train the  rebels, an official said.        
 In the most strident verbal attack on Colonel Qaddafi to date by an  American official, Secretary of State Hillary Rodham Clinton said  Thursday that the Western powers had little choice but to provide  critical military backing for the rebels. “We want to support the  opposition who are standing against the dictator,” she told an  applauding audience in Tunisia on Thursday. “This is a man who has no  conscience and will threaten anyone in his way.”
 The Qaddafi government responded to the potential United Nations action with threats. “Any foreign military act against Libya will expose all air and maritime  traffic in the Mediterranean Sea to danger and civilian and military  facilities will become targets of Libya’s counter-attack,” it said in a  statement carried on Libyan television and the official news agency,  JANA, Reuters reported. “The Mediterranean basin will face danger not  just in the short-term, but also in the long-term."
This has come as a real surprise to me. I thought the Obama administration was acting very cautiously about Libya, and had no real intention to support this UN resolution. Secretary of Defense Gates only a couple of weeks ago was pointing out that a no-fly zone was an act of war, since it meant destroying Libya's air defenses. What changed the administration's mind? And why has there been so little public discussion of this rather momentous step? Read Andrew Sullivan's 
Some Questions on the Imminent War. As Kevin Drum says, this is 
Our Shiny New War in Libya. Norm has a lot to say about Libya - 
Libya Now.
The Guardian 
live-blogged the UN vote and has some additional information. Voting for the resolution: Permanent members: United States, Britain, France. Non-permanent members: Bosnia and Herzegovina, Colombia, Gabon, Lebanon, Nigeria, Portugal, South Africa. Abstaining: Permanent members: Russia, China. Non-permanent members: Germany, Brazil, India.
I think that if all our attention were not directed towards what is  happening in Japan, this would be a much bigger public deal in the U.S.  I'm watching the PBS Newshour right now, and they haven't yet addressed  the UN decision.