Imposing a no-fly zone is nothing less than an act of war that can easily force the nations involved to take further steps, including ground troops. Many of those bashing inaction on the part of the West, the Europeans and/or Obama are making it sound as if we were talking about a videogame. Especially so since it is not even clear WHO exactly we are supposed to support. The rebels are a pretty heterogeneous bunch of people with a wide variety of views and positions and have only days ago taken steps to establish a joint leadership. Stopping a dictator from butchering people sounds like a good and noble task but interfering without exactly knowing whose side we are taking is something that lessons from past interventions should tell us to be pretty cautious about. Humanitarian aid is another question though.