REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE CONTENT OF THIS VIDEO, WHICH HAS BEEN OBTAINED FROM A SOCIAL MEDIA WEBSITE<br/> <br />The streets of Deir al Zor lie in a cloud of dust and rubble.<br/> <br />(NAT)<br/> <br />This shows what air power, Syrian President Bashar al Assad's main weapon in the war against rebel fighters, can do.<br/> <br />Locals in Idlib province make their way through smoke-filled streets after government forces dropped a barrel bomb, according to amateur video posted to the Internet.<br/> <br />It's just one of several locations targeted by Assad's forces.<br/> <br />But Rebels in the Idlib countryside are firing back --- taking aim at a barrier used by regime forces.<br/> <br />(NATSOT EXPLOSION)<br/> <br />The civil war that has now entered it's fourth year shows no sign of letting up.<br/> <br />Forces loyal to Syrian President Bashar al-Assad have launched an offensive to recapture rebel stronghold Jobar.<br/> <br />They conducted at least 27 air strikes on the damascus suburb on Tuesday, killing a chil
