KHAN YOUNIS, Gaza Strip — Winter is hitting the Gaza Strip and many of the nearly 2 million Palestinians displaced by the devastating 14-month war with Israel are struggling to protect themselves from the wind, cold and rain. There is a shortage of blankets and warm clothing, little wood for fires, and the tents and patched-together tarps families are living in have grown increasingly threadbare after months of heavy use, according to aid workers and residents. Shadia Aiyada, who was displaced