Only on the "CBS This Morning" podcast, producer Kira Kleaveland joins CBS News correspondent Vladimir Duthiers to discuss how Ryan O'Callaghan's "Note to Self" came together. In the Note to Self, O'Callaghan opens up about the personal struggles he faced on and off the field. He played in the NFL for six years, including a trip to the Super Bowl with the New England Patriots. You can watch the O'Callaghan's "Note to Self" on the "CBS This Morning" website.