When we analyze this war in a materialistic way and ask when is it going to end and who will be the winner and the loser, it means that we do not see the endgame.
Bashar al-AssadThe United States doesn't have the will to work against al-Nusra or even ISIS, because they believe that this is a card they can use for their own agenda. If they attack al-Nusra or ISIS, they will lose a very important card regarding the situation in Syria.
Bashar al-Assad