When is a band not itself anymore?: As bands age and line-ups shift, fans get to decide

On this year's Grammy Awards, the surviving members of the Eagles joined up with Jackson Browne to perform "Take It Easy" in honor of Glenn Frey, who passed away in mid-January. In the aftermath of the tribute appearance, Eagles drummer/co-vocalist/co-founder Don Henley told BBC Radio 2 the performance was "very difficult and very emotional," and added, “That was the final farewell. I don’t think you’ll see us performing again. I think that was probably it. I think it was an ap