Anti-government protesters burn tyres during a demonstration against Syrian President Bashar al-Assad’s regime in the town of Daria, near Damascus February 6, 2012. Syrian forces bombarded Homs on Monday, killing 50 people in a sustained assault on several districts of the city which has become a centre of armed opposition to President Bashar al-Assad, the Syrian National Council opposition group said. REUTERS/Handout (SYRIA – Tags: POLITICS CIVIL UNREST) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS