Wim Wenders on Pina: 'Pina had gone deep into research of the human soul' - video

Wim Wenders on Pina: 'Pina had gone deep into research of the human soul' - video. The director of Pina, which pays tribute to the legendary German choreographer Pina Bausch and has had its world premiere at the Berlin film festival, tells Charlotte Higgins how filming in 3D helped honour her memory