A Palestinian man mourns over the bodies of two children, killed in an explosion in a public playground on the beachfront of Shati refugee camp, as they are wheeled into al-Shifa hospital in Gaza City on July 28, 2014. Palestinian medical sources blamed death of at least seven Palestinian children on air strikes launched by the Israeli military, which in turn said Hamas had misfired its own rockets at the camp and at the Shifa hospital. AFP PHOTO/MARCO LONGARI        (Photo credit should read MARCO LONGARI/AFP/Getty Images)