Oualata, Mauritania: I met this salt caravan after a four-day expedition into the middle of the Sahara desert. No roads lead to this place, so we navigated by compass. Hundreds of dromedaries and their masters were present on this desert plain where nothing lives. Two wells had been dug to water the camels before they left for Mali, Côte d'Ivoire and Burkina Faso to sell the salt. When I returned from the trip I realised that this image of a camel owner ordering the dromedaries looked like a conductor with an orchestra.