Haven't had a chance to listen to ATR so if this was discussed ad nauseum forgive me, but it wasn't on Bloodhorse.com that I could see, and happened today, so I thought it might be breaking.
The Breeders' Cup folks just posted a video
http://www.youtube.com/watch?v=qVJ3QthurT0 of his Classic win, in memoriam on Facebook. I was a bit stunned to find out that way. He was 24 and got pensioned about a year ago I believe, so I'm assuming it's the infirmities of old age. RIP big guy. I really enjoyed watching him run. It's really depressing when one of the first big horses you took an interest in passes away.
I'm so glad he was in good hands at Old Friends. They're truly special people.