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** FILE ** In this May 6, 1978 file photo, Affirmed, with jockey Steve Cauthen up, crosses the finish line to win the 104th running of the Kentucky Derby in Louisville, Ky.. Alydar, with jockey Jorge Velasquez up, obscured behind Affirmed, finished second. Thirty years later, Cauthen is ready to give up the title as "last jockey to win the Triple Crown." He thinks Big Brown could be the horse to end the Triple Crown drought, even if the big bay colt's wins have lacked the drama of the Affirmed-Alydar rivalry. (AP Photo/File)