Whatever your chosen subject, for photographers there is one thing that is more important than anything else, that is access. If you can't get at your subject, then your project won't get off the ground.
When working in remote and hostile regions, that access is often obtained by working alongside non-governmental organisations (NGOs) who are delivering aid or medical assistance. In August, photographer Phil Moore accompanied a Medecins Sans Frontieres (MSF) vaccination team in the remote mountainous war-torn eastern Democratic Republic of Congo (DR Congo). Here he shares the story of his trip. (Read more on the BBC News — In Pictures)