Fighting between powerful militias battling for control of Tripoli’s airport broke out again Friday, just hours after they had agreed a truce, an airport official and witnesses said. The clashes came a day after the government sought the United Nations’ help to prevent the country from becoming a “failed state.” “The airport was once again today hit by mortar fire which struck the security offices,” but caused no casualties, airport security official al-Jilani al-Dahech told AFP. Airport security forces returned fire, he said without giving further details. Libya’s main international airport has been closed since Sunday, with rockets causing damage to aircraft and the main terminal building amid warnings by officials that the facility could remain closed for months. The violence erupted when Islamist gunmen from the city of Misrata attacked anti-Islamist fighters from the city of Zintan who have been controlling the airport for the past […]