Authors:

The 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.

"Syria's al-Assad speaks: Why he blames U.S. for truce's demise, and says war will 'drag on'". Interview with Ian Phillips, www.theglobeandmail.com. September 22, 2016.
The 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