Emmylou Harris, Rodney Crowell's 'Old Yellow Moon' long in making

The innovators of country rock have been friends and collaborators since the 1970s. Their first full album as duet partners reflects that. There's close to 40 years' worth of symmetry on "Old Yellow Moon," the new album from longtime friends and country-rock trailblazers Emmylou Harris and Rodney Crowell.