Kat, I missed that story the first time around and I'm glad you linked it.....wonderful story.
BTW, Man O' War never raced in the Kentucky Derby although he did win the Preakness and the Belmont. Stories differ, but the owner felt the race in May was too early for a 3 year old and never entered him. He came along at a time when horse racing was needing a shot in the arm. Certainly a great horse and when combined with his excellent stud record, probably worthy to be voted the #1 Horse of the Century. I would still place him at #2 though because on the basis of racing alone, I can't imagine (and the records show) a greater horse than Secretariat. His stud career wasn't much but in every other way from smarts to heart, he has to be at the top.
Anyone who has a chance needs to visit Kentucky Horse Park in Lexington. It's a beautiful facility with a fantastic museum laid out as well as any I have ever seen. We've been there a time or two and they do a fine job of keeping everything changing as well with short term exhibits to compliment the permanent things. Great place!