New biography reveals Joni Mitchell's feelings on her career

Joni Mitchell is one of the most acclaimed singer-songwriters in modern times. Her seminal albums sold millions of copies and influenced two generations of artists. Now, a new biography, "Reckless Daughter: A Portrait of Joni Mitchell," offers a deep portrait of the 74-year-old Mitchell. NewsHour Weekend’s Phil Hirschkorn spoke to author David Yaffe.