Russian and Syrian regime warplanes launched airstrikes on rebel-held territory on Sunday in an attempt to fend off advances made by antigovernment forces that included a stunning assault on Aleppo.The warplanes struck the northwestern city of Idlib,

Syrian President Bashar al-Assad sought to shore up support from his allies Sunday, after a monitor said a shock rebel offensive saw government forces lose control of Aleppo for the first time since the start of the country's civil war.