The historian Gary Bass has penned a new book that is getting rave reviews. The Blood Telegram: Nixon, Kissinger and a Forgotten Genocide tells the story of the muted American response to a human rights and humanitarian catastrophe that befell Bangladesh in the wake of its separation from Pakistan in the early 1970s. 
Gary and I talk about his story, what made this particular genocide "forgotten", and how one goes about researching history like this.  Have a listen!