KHAN YOUNIS, Gaza Strip (AP) — Yousra Abu Sharekh’s days begin in the southern Gaza Strip often after sleepless nights amid blaring ambulance sirens and the clamor of neighbors in the brief pause between relentless Israeli airstrikes. By daybreak, the 33-year-old mother is on the hunt for bread, lining up for hours at bakeries to buy one bag to feed her two children. Without electricity, disconnected from her relatives and terrified by the sounds of warplanes overhead, she rushes in the afternoon to see her sick mother at a crowded U.N. shelter 20 minutes away. Only two weeks ago, Abu...