Kola Bah used to earn a living as a tour guide in Mali's historic city of Djenné, once a center of Islamic learning known for the sprawling mud-brick mosque that has been on the UNESCO World Heritage in Danger list since 2016.
The Grand Mosque of Djenné — the world’s largest mud-brick building — used to draw tens of thousands of tourists to central Mali every year. Now it's threatened by conflict between jihadi rebels, government forces and other groups.
