The United States coalition has targeted two powerful al-Qaeda related groups in Syria, Nusra Front and Ahrar al-Sham in Aleppo and in Idlib province in the northwest of Syria. It is the second time groups other than the Islamic State have been hit by the coalition, as the Nusra Front has been making headway in Idlib in the past week, pushing U.S.-supported rebel groups from their stronghold in the province.

Speaking on Al Jazeera English, Carnegie’s Yezid Sayigh said that “if the situation is not brought under control, Nusra Front potentially could end up controlling at least one—if not both—of the last two border crossings open to the moderate opposition into Turkey, through which they receive the flow of recruits, trainees, weapons and munitions, and international humanitarian assistance. Everything that the liberated areas rely on now, that is based in Turkey, works through these two border crossings.”

This was originally broadcast on Al Jazeera English.