GAZA CITY, Gaza Strip (AP) — Crouching amid a pile of rubble that used to be his Gaza home, Mahmoud Hammad scoops dirt into a large sieve and shakes it, looking carefully before dumping it out. In recent days, he was lucky. Tiny bones appeared. He believes they belong to the unborn girl his pregnant wife was carrying when an Israeli airstrike hit the family’s building more than two years ago, killing his wife and their five children. He added the fragments to a box of bones he has collected