Wow, I had no idea that was Graham Nash! He certainly has changed a lot since the last footage I saw of him (which was from the '80s). I love The Hollies - I think people tend to forget he was a member because he made such a success of teaming up with David Crosby and Stephen Stills. I admit that I know little about Crosby, Stills and Nash - "Teach Your Children Well" is about my limit - but it's a good song!
I'm sorry to read about Stephen Stills' battle with cancer. I hope he pulls through his treatment (and Graham too, if he is indeed also ill).