Why Libya and not other places?

As for the "Why Libya? question I must respond with another question: "Why not?" Unlike Darfur it's got a coast, and we've got numerous bases right off that coast. Unlike Cote d'Iviore it's not a former colonial possession of anyone whose bothered to maintain a sphere of influence in the area, so going there ruffles no feathers at the Security Council. Unlike Bahrain the opposition isn't tied to the Iranians, and if they took over they could easily slaughter the entire Fifth Fleet like pigs.

I can go on if you really want, but I think you get the point. If you support humanitarian interventions anywhere you must support an intervention in Libya because there is literally no reason for us to stay out.