Kentucky Derby entrant Black Onyx and Normandy Invasion workout at Churchill Downs Thursday, May 2, 2013, in Louisville, Ky. Saturday will be the 139th running of the Kentucky Derby. (AP Photo/Morry ... more 
Kentucky Derby entrant Black Onyx and Normandy Invasion workout at Churchill Downs Thursday, May 2, 2013, in Louisville, Ky. Saturday will be the 139th running of the Kentucky Derby. (AP Photo/Morry Gash) less 
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Associated Press | Photo By Morry Gash
Fri, May 3, 2013 12:15 PM EDT