Louisville, Kentucky, United States--The Kentucky Derby Museum, along with Secretariat Festival and Secretariat.com, officially unveiled the World’s Largest Horseshoe in a special event at the Museum; Measuring 206 centimeters wide and 213.3 centimeters tall, (the equivalent to 6 feet, 9.1 inches wide and 6 feet, 11.8 inches tall) the 610-pound...