Postpartum Depression, Kevin McCarthy, Norman Lear Tribute

Guest host: Seth Doane. In our cover story, Tracy Smith looks at the tragedy of postpartum depression, and a promising new treatment. Also: Robert Costa interviews former House Speaker Kevin McCarthy, who this week announced his retirement from Congress; Ted Koppel looks at how black lung disease is worsening among ever-younger coal miners, and we look back on the lives of legendary producer Norman Lear and Oscar-nominated actor Ryan O'Neal.