An anti-Gaddafi fighter fires a heavy machine gun towards pro-Gadaffi forces in the besieged city of Bani Walid September 16, 2011. The forces of Libya's new leaders attacked two besieged towns on Friday, storming into Bani Walid and pushing forward at Sirte, as they tried to finish off resistance from diehard supporters of Muammar Gaddafi. REUTERS/Youssef Boudlal (LIBYA - Tags: POLITICS CONFLICT MILITARY)