MOGADISHU (AFP) - Key Somali warlords agreed to disarm their fighters and join the government, but the breakthrough was marred by a deadly gun battle during talks that brokered the accord. Seven warlords, who controlled most of Mogadishu before it fell to Islamist fighters in June, signed the pact, even as forces loyal to one of them engaged in a firefight with security forces outside the talks' venue. "The principal warlords who controlled parts of the Somali capital have decided to surrender their weapons to the transitional federal government," government spokesman Abdirahman Dinari told AFP. "They also agreed to instruct...