Libyan rebels pray near a truck with a mounted weapon on the frontline south of the town of Bir Ghanam July 16, 2011. Heavy clashes between rebels and forces loyal to Muammar Gaddafi broke out on Saturday in Libya's Western Mountains as insurgents sought to push towards Tripoli. Sustained gunfire and volleys of artillery could be heard from the village of Bir Ayad, 15 km (9 miles) south of the front line at the town of Bir Ghanam. REUTERS/Ammar Awad (LIBYA - Tags: POLITICS CONFLICT IMAGES OF THE DAY)