Amira Malik Miller

There is something especially depressing about the revelations of sexual exploitation and gross misconduct inside one of the world's best known humanitarian aid organisations. Oxfam is at the centre of a storm of allegations of abusive behaviour, shoddy recruitment and management cover up - now the entire aid sector is under scrutiny for safeguarding failures which appear to go back decades. Stephen Sackur speaks to Amira Malik Miller - an experienced aid worker who witnessed misconduct at first hand and is prepared to speak out. What went wrong and why?