Spent a day walking around Manshiyat Naser, a neighborhood on the edge of Cairo. It's home to the Zabbaleen — around 60,000 Coptic Christians who've been collecting and recycling the city's trash for generations. The men drive out into Cairo in the morning and bring the garbage back. The women sort it in the courtyards. Organic stuff feeds the pigs, everything else gets sold to factories. Some families have small processing workshops right inside their buildings. The place looks pretty rough, you're literally walking on piles of trash, but the people were the friendliest I met anywhere in Cairo. Women sitting in the courtyards sorting trash, playing music from a speaker, chatting with each other. Men after a long day sitting in cafes, playing backgammon, smoking shisha, laughing.…