RAFAH, Gaza Strip (AP) — Desperate Palestinians fleeing Israel’s expanding ground offensive crowded into an ever-shrinking area of the Gaza Strip as the Israel-Hamas war entered its third month Friday. The United Nations warned its aid operation is “in tatters” because no place in the besieged enclave is safe. The United Nations’ humanitarian affairs section said its ability to receive vital aid supplies has been “significantly impaired” over the past few days as trucks and staff were stranded by the fighting, and telecommunications were cut off. Tens of thousands of people displaced by the fighting have congregated in Rafah, in the far south of the Gaza Strip near the border with Egypt, and a nearby strip of barren coastland designed a safe zone.