Countries struggled at an international peace summit for Libya struggled on Sunday to draw eastern military commander Khalifa Haftar back into diplomacy, days after he quit talks and more than half of Libya’s oil output was shut in areas he controls. Haftar, whose forces are bearing down on the capital Tripoli with the backing of Egypt, the United Arab Emirates, Russian mercenaries and African troops, was expected to attend the one-day summit despite having abandoned talks last week. Turkey has rushed troops to Tripoli to help an internationally recognized government resist Haftar’s assault. Up to 2,000 Turkish-backed fighters from Syria’s civil war have also joined the battle, a U.N. official said on Saturday. Haftar quit a Turkish-Russian summit a week ago […]