For 34 hours, the vast majority of the more than 2 million Palestinians who live in Gaza had no way to reach the outside world, or one another. They had no way to know whether their loved ones were alive or dead. Emergency phone lines stopped ringing. Desperate paramedics tried to save people by driving toward the sound of explosions. Wounded people were left to die in the street. On Friday at sunset, three weeks into Israel’s bombing campaign in Gaza — and as Palestinians braced themselves for