New film, "MLK/FBI," explores how FBI tracked Martin Luther King Jr. for years

The Rev. Martin Luther King Jr., for a period of 13 years, was one of the most scrutinized and filmed figures in American history, from the Montgomery bus boycott in 1955 to his assassination in Memphis in 1968. But it wasn't just the press watching him. The Federal Bureau of Investigation, which J. Edgar Hoover led, took a keen interest in King as he became the de facto leader of the civil rights movement. As King became ever bigger, Hoover's obsession grew as well. As documented in a new film, "MLK/FBI," out Friday in theaters and on video on demand, Hoover expended untold amounts of money a...