The Obama administration today stepped back from the prospect of imminent U.S. military action to support rebel forces in Libya, voicing reluctance to enforce a no-fly zone without United Nations approval. Secretary of State Hillary Rodham Clinton, CIA Director Leon Panetta and other national security "principals" were meeting in the White House situation room to discuss administration options for Libya. But Obama had no plans to attend, and press secretary Jay Carney repeatedly made clear that this is "not a decision meeting." "I don't want to raise expectations that this is a meeting that will lead to imminent, concrete action,"...