Visa Pour l'Image: from inmate-run prisons to unseen Vietnam War photography

FRANCE 24’s photography critic Olivia Salazar-Winspear brings us the highlights from the world's biggest photojournalism festival, in the southern French city of Perpignan. We see inside a Venezuelan prison which is under inmate control, we discover rare photographs of the Vietnam War and we hear from an amateur photographer who went to Afghanistan off her own bat.