Rebel forces take cover inside a building in a Damascus suburb as they launch an attack on government forces.<br/> <br />They prepare to storm positions held by the government's 81st Brigade.<br/> <br />The video, which can not be independently verified by Reuters, shows the rebels unleashing fire power.<br/> <br />They shout 'God is Great,' as they ride in captured tanks.<br/> <br />As rebels close in, the war comes to the streets.<br/> <br />The U.S. and some of its allies are now contemplating their first military intervention -- the aim would be to punish president Bashar al-Assad's government for killing more than 1,400 people in a chemical weapons attack last month.<br/> <br />While the U.S. Congress is set to debate over taking action, Syria denies blame for that incident.<br/> <br />In another suburb, rebels move into a building once held by government forces. They rummage thorough the pockets of a dead soldier.<br/> <br />Syria's civil war, now in its third year, has killed more than 100,000 people. Millions have be
