On Monday, politicians from both of Libya's rival governments appeared to reject a UN-brokered power-sharing arrangement that had been announced only days earlier. The breakdown of the proposed unity government is only the latest disaster for Libya, which has been racked by four years of war between a dizzying array of political factions , Islamist militias , Salafi fanatics , secular nationalists and tribal groups. If you can't keep track of it all, don't worry: Here’s a simple explainer of what’s happened in the country since Gaddafi was ousted in ...