A masked Palestinian youth throws a stone towards Israeli riot police during clashes following Friday prayers at Jerusalem's al-Aqsa mosque compound on September 6, 2013. Israeli police fired stun grenades at stone-throwing Palestinian protesters after Friday prayers in Jerusalem's Old City, arresting 15 of them, police said. Photo by Sliman Khader/Flash 90 *** Local Caption *** ????????? ??????? ???? ?????? ???? ?? ???? ????? ?? ???? ?????? ????? ???? ?????? ??"?