An estimated 7,000 Gazans scratch an insecure living by working in the tunnels, stretching from southern Gaza into Egypt. The network of tunnels is an essential prop to Gazan business. Filmed by a young Gazan film-maker, "The Gaza tunnels" provides an extraordinary glimpse into the lives of the men who build and work in the underground lifeline of the Gaza economy, with astonishing footage of the movement of goods and people through the tunnels themselves.br br Witness is a weekly show that brings world issues into focus with courageous and inspiring human stories.