==REUTERS CANNOT INDEPENDENTLY VERIFY THE CONTENTS OF THIS VIDEO==<br/> <br />This is said to be Aleppo, Syria, just before a massive explosion thought to be a rebel attack on government forces.<br/> <br />It's unclear how many people were killed or hurt in the assault.<br/> <br />It's one of several amateur videos posted today that purport to show the continuing violence in Syria's three-long civil war.<br/> <br />More video claims to show rebels targeting government forces in the central city of Homs.<br/> <br />Homs was the epicenter of the uprising against President Bashar al-Assad, but in May rebels abandoned the very heart of the city...what had been their last stronghold.<br/> <br />A monitoring group says government air strikes near Homs over two days have left nearly 50 people dead.<br/> <br />And even more violence still...in eastern Ghouta, near the capital Damascus.<br/> <br />Streets destroyed, after what was reported to be a government aerial bombardment.<br/> <br />Several people were said to be killed, their bodie
