Smoke from cookfires wafts up into the sky at dawn in Breidjing Refugee Camp in eastern Chad. (From the book What I Eat: Around the World in 80 Diets.) The sunrise ushers in another day of waiting. It's November, two months after the rainy season, but temperatures are still low. Women sweep the dirt in front of their tents while children walk to the water depot with empty plastic containers as roosters crow and donkeys bray into the desert air, which is beginning to lose its nighttime chill.