Military personnel stand by the race track during morning workouts at Churchill Downs Friday, May 3, 2013, in Louisville, Ky. Security has been stepped up at the track for the running of the 139th Kentucky Oaks and Kentucky Derby. (AP Photo/David Goldman)

Associated Press
Military personnel stand by the race track during morning workouts at Churchill Downs Friday, May 3, 2013, in Louisville, Ky. Security has been stepped up at the track for the running of the 139th Kentucky Oaks and Kentucky Derby. (AP Photo/David Goldman)
Military personnel stand by the race track during morning workouts at Churchill Downs Friday, May 3, 2013, in Louisville, Ky. Security has been stepped up at the track for the running of the 139th Kentucky Oaks and Kentucky Derby. (AP Photo/David Goldman)
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