#CharlesSpencer is opening up about the difficult moments surrounding #PrincessDiana’s funeral, reflecting on the experience years later in his upcoming memoir, ‘Swan Song: Diana, My Sister.’ He shares his perspective on what that day meant for #PrinceWilliam and #PrinceHarry, and the memories that have stayed with him, in an exclusive PEOPLE interview. Watch the full sit-down on the #PeopleApp.