Rebel fighters gather in an artillery academy of Aleppo, Syria, August 6, 2016. REUTERS/Ammar Abdullah

Rebel fighters gather in an artillery academy of Aleppo, Syria, August 6, 2016. REUTERS/Ammar Abdullah

Rebel fighters gather in an artillery academy of Aleppo, Syria, August 6, 2016. REUTERS/Ammar Abdullah

August 7, 2016 1:30 PM (UTC+8)