Mourners carry into a mosque the body of Muhammad Abu Musallam, a Palestinian young boy who was killed along with his sister and his brother in an Israeli tank attack, during their funeral on July 18, 2014 in Beit Lahia, north of the Gaza strip. Israel warned it could broaden a Gaza ground assault aimed at smashing Hamas's network of cross-border tunnels, as it stepped up attacks that have killed more than 260 Palestinians.  AFP PHOTO / MAHMUD HAMS        (Photo credit should read MAHMUD HAMS/AFP via Getty Images)