FILE - In this Sept. 23, 1985 file photo, country singer Johnny Cash appears at a FarmAid benefit concert at the University of Illinois in Champaign, Ill. His late-career revival boosted his spirits and was a memorable bookend for his work, and the story behind it lifts "Johnny Cash: American Rebel," a two-hour CMT documentary that premieres Sept. 12 at 9 p.m. EDT, on the 12th anniversary of Cash's death at age 71. (AP Photo/Mary Allen, File)