Obstacles to a Syrian Regime Victory in Aleppo

In the wake of their seizure of Qusair in western Syria, Syrian loyalist forces are bent on capitalizing on their newfound momentum by wresting more of the loyalist core from the rebels and advancing on rebel-held territory. In order to continue their advance, however, loyalist forces will have to address logistical difficulties, potentially fight through powerful rebel blocking positions and overcome increasing U.S. weapons aid to the rebels.