From the RP site:
Flagship Castleton Lyons sire Bernstein dies
BY NANCY SEXTON 10:03PM 23 OCT 2011
BERNSTEIN, winner of the 1999 Railway Stakes for Aidan O'Brien and later the sire of 16 Grade 1 winners, was put down on Sunday due to complications of colic.
The son of Storm Cat, who was the flagship sire of Castleton Lyons in Kentucky, was 14. He covered 102 mares during the past season at an advertised fee of $20,000.
Shane Ryan, president of Castleton Lyons, said: "Today is a very sad day for all of us on the farm as Bernstein was a very special stallion that in an all too brief career at stud has sired top class horses throughout the world.
"I would like to thank Doctors Nathan Slovis, Laura Werner and Dwayne Rodgerson of Hagyard Equine Medical Institute, and the management and staff of Castleton Lyons for their great efforts to try and save Bernstein today.
"I would also like to thank all of our clients that supported this stallion and I would hope that Bernstein's influence in the bloodstock world will be felt for many years to come."
Purchased by the Coolmore team for $925,000 as a foal, Bernstein made a striking impression as a juvenile for Aidan O'Brien, winning his first two starts in Ireland including the Railway Stakes by a combined ten lengths.
The bubble burst when he was unplaced at the odds on favourite behind Sinndar in the National Stakes. However, he returned the following year to land the Group 3 Concorde Stakes.
Initially retired to Buck Pond Farm in Kentucky at a fee of $10,000, Bernstein wasted little time in making his presence felt and by 2005 had been installed atCastleton Lyons at a fee of $15,000.
The Grade 1-winning fillies Dream Empress and Miss World have to date acted as the stallion's major flag-bearers in the US but his influence is most keenly felt in Argentina where he is the sire of14 Group 1 winners, including champions Storm Military, Savor Bien and Storm Marcopolo. Another representative, Goshawk Ken, was a champion two-year-old in Japan.
In all, he is the sire of 70 stakes winners and the earners of more than $33.8 million.
Bred by Brushwood Stable, Bernstein was out of the minor-winning Affirmed mare La Affirmed and a half-brother to Grade 3 winner Caress, also the dam of Grade 1 winner and successful sire Sky Mesa.