Atef Al-Buhaisi, 6, once dreamed of a career building houses. Now, all he craves is to return to school. In Israel's war with Hamas, Atef's home has been bombed, his teacher killed and his school in Nuseirat turned into a refuge for displaced people. He lives in a cramped tent with his family in Deir al-Balah in central Gaza, where he sleeps clinging to his grandmother and fears walking alone even during the day.