Forces loyal to Libyan military strongman Khalifa Haftar blocked oil exports from the war-ravaged country's main ports Saturday, raising the stakes on the eve of an international summit aimed at bringing peace to the North African nation. The move to cripple the country's main source of income was a protest against Turkey's decision to send troops to shore up Haftar's rival, the head of Tripoli's UN-recognized government Fayez al-Sarraj. It ...