Terrible news. Chris Squire was my first bass guitar hero. That signature Rickenbacker bass, those beautiful vocal harmonies and great stage presence. I was fortunate enough to see Yes live many times in the '70's and '80's and Chris was always my focal point on stage.
Yessongs is probably the best showcase for his playing, and I guess it's time to dig out my vinyl copy that I've just about played the grooves out of, and remember a truly great musician.