Does an apology from J. Cole signal an end to a months-long feud involving the Grammy winner, Kendrick Lamar and Drake? NPR's Michel Martin talks to Justin Tinsley, senior culture writer for Andscape.

J. Cole said there's one part of his new album that he's not proud of: a track in which he disses Kendrick Lamar. The artist, who dropped his album "Might Delete Later” on Friday, released a ...