Fergal Keane talks to people who have taken risks and made sacrifices to stand up for what they believe in. Lana Vandenberghe was working as a secretary for the Independent Police Complaints Commission when she found herself assigned to an investigation into one of the most controversial police actions of recent times: the shooting dead of Jean Charles de Menezes at Stockwell tube station in London. When, during the course of her work, she saw pictures and letters that seemed to contradict what the police were saying about the incident, she decided to leak the documents to the press. It was a decision that would have dramatic consequences for her and contribute to calls for the resignation of Sir Ian Blair, then Commissioner of the Metropolitan Police.