"We are on the shores of Lake Chad in the Dar-es-Salam refugee camp, a dusty, crowded site sheltering some 5,000 people who fled over the border from northern Nigeria to escape the Boko Haram insurgency," writes AFP photographer Philippe Desmazes. "Among them are a great many children. Under a large white tent UNICEF has been holding art therapy workshops for young refugees. It’s a common technique used to help children in war zones overcome their trauma - and also a way to fill the endless days in the camp."