A Palestinian family, who fled the UN school that was hit by an Israeli tank shell, arrive at the Beit Hanun hospital on July 24, 2014. Fifteen people were killed when Israeli fire hit a UN-run school in Gaza, raising the Palestinian toll on the 17th day of the conflict to 777, medics said. AFP PHOTO/MARCO LONGARI        (Photo credit should read MARCO LONGARI/AFP/Getty Images)