A video reportedly shot by an amateur in the Syrian city of Idlib Wednesday shows a crippled Syrian military helicopter spiraling down before it explodes in flames. Syrian rebels say they shot down the helicopter, according to The Telegraph. The rebels reportedly have acquired heavy weapons in recent weeks, The Telegraph reported, pushing the Syrian air force to attack rebel-held zones from higher altitudes. Syria's divided rebels have agreed to set up a joint leadership to oversee their battle to overthrow President Bashar Assad, two insurgent sources said Tuesday as fighting raged in cities across the country. Rebels hope...