“The decay of America is original and massive in its scale,” reflects Kurt Markus, the esteemed photographer, who, with his son, Ian, filmed the small, pungent rock ’n’ roll tour documentary, “John Mellencamp: It’s About You.”

Stark evidence of that assessment is strewn throughout this very personal record of the 2009 summer tour of Kurt Markus’s friend, the Indiana-born rocker John Mellencamp, with Bob Dylan and Willie Nelson. (FULL REVIEW: Stephen Holden, The New York Times)