. >> wynton marsalis: ken's films touch something at the heart of our mythology, in who we have been at our best and at our worst, and who we want to be. >> pelley: composer wynton marsalis collaborated on "jazz" and "country music." marsalis is artistic director of new york's jazz at lincoln center, and something of an expert on improvising with ken burns. >> marsalis: he'll be vibrating, and that'll be in the fourth year of something, and it'll be 1:00 in the morning after you've worked since 9:00 in the morning. so now it's 1:00, so-- and he's till like, "no, no, right here. we need to-- right here, we need to," and to see like a person with that type of energy and just on fire like that. as he's grown old, it's got worse. >> pelley: the fire's gotten bigger. >> marsalis: the fire, the fire, the fire-- just the enthusiasm, the fire, the passion. >> pelley: ken told us that youi see' him. so, what do you see? >> marsalis: you know, for me, i always see like a kid. if you can retain that childish awe and wonderment and believe that you can change things, if you can maintain that, an