A moving train fills the frame of a shaky video. A ladder looms, and hands grip the rungs. A blur of movement, and you're inside an open train car piled with coal, trees whipping by on either side.

HAGGARD: (Singing) The first thing I remember knowing was a lonesome whistle blowing and a young'un's dream of growing up to ride on a freight train leaving town, not knowing where I'm bound. And no ...

This is FRESH AIR. I'm David Bianculli. This week marks the 40th anniversary of Farm Aid, the country music concert founded by Willie Nelson as a fundraiser to benefit farmers. Held in Champaign, ...