On this trip, I have performed 3 cholecystectomies. On my last trip we performed several as well, including one woman who had 262 stones! I have been quite surprised how beautiful the stones are from Nigerian patients.
We have discussed cassava previously. It is a dietary staple in Nigeria. Today on the way to work we learned some more. The young man in the picture has a mobile millstone for grinding cassava. The mash is then made into gari. His machine runs on gasoline. He charges 200 Naira ($1.33) to grind 2 large bags.