Famine has been mostly averted in Gaza as a surge of aid enters the territory during a fragile ceasefire, the United Nations humanitarian chief said Sunday. But he warned the threat could return quickly if the truce collapses.

To spend a rush hour these days at any of the traffic-snarled checkpoints outside Palestinian cities in the West Bank is to hear of the endless problems they have brought — families divided, money lost,

Israel completed its withdrawal from the Netzarim Corridor on Sunday, a militarized zone that splits Gaza in half, as part of its commitments under a ceasefire agreement with Hamas. Hundreds of thousands of Palestinians have filed through the area,