In the new movie “Blue Moon,” Oscar-nominee Ethan Hawke plays lyricist Lorenz Hart, a brilliant but heartbroken songwriter forced to watch his former partner Richard Rodgers gain even greater fame collaborating with Oscar Hammerstein II. Hawke talks with Tracy Smith about the challenging role of Hart; his own youthful ambitions and about joining the faces on the walls of the legendary Broadway watering hole Sardi's Restaurant. | CBS Sunday Morning