Reporting on China

What is it like being a journalist in China? One of the most-watched videos on our site shows a BBC team being attacked by a group of thugs when they went to try to interview a "petitioner" - someone who travels to Beijing to register a grievance. We speak to a group of people who have reported in China about their experiences.

Also, after news of some success for a pioneering DNA therapy for sickle cell disease, we talk to people who have the condition and people who treat it.

Picture: The BBC's John Sudworth reporting in Beijing (BBC)