In this image taken from leaked video obtained by Ugarit News and posted on Monday, July 15, 2013, which has been authenticated based on its contents and other AP reporting, purports to show a fireball from an explosion at a weapons depot set off by rocket attacks that struck government-held districts in the central Syrian city of Homs on Thursday, Aug. 1, 2013. The blasts sent a massive ball of fire into the sky, killing scores and causing widespread damage and panic among residents, many of whom are supporters of President Bashar Assad.(AP Photo/Ugarit News via AP video)