Palestinians take part in a military exercise at a summer camp, organized by Islamic Jihad movement, in the southern Gaza Strip City of Khan Younis, on July 13, 2016. Islamic Jihad stages dozens of military summer camps for young Palestinians in the Gaza Strip, organizers said. (Xinhua/Khaled Omar)

Palestinians take part in a military exercise at a summer camp, organized by Islamic Jihad movement, in the southern Gaza Strip City of Khan Younis, on July 13, 2016. Islamic Jihad stages dozens of military summer camps for young Palestinians in the Gaza Strip, organizers said. (Xinhua/Khaled Omar)

Palestinians take part in a military exercise at a summer camp, organized by Islamic Jihad movement, in the southern Gaza Strip City of Khan Younis, on July 13, 2016. Islamic Jihad stages dozens of military summer camps for young Palestinians in the Gaza Strip, organizers said. (Xinhua/Khaled Omar)