I've been working with a village of Tuareg for ten years, in a small people-sized support operation. They live in the Sahara desert, a day away from the historic city of Timbuktu in Mali, out in the vastness.

We restocked their goats and camels after a terrible drought, helped them dig a new well and build a small village school.

But now I need to pull out - I can't continue with things I used to be able to do. But I don't want to abandon them.

So this pod tells the story, and about the dilemma of a humanitarian with a need to pass this on.