DULUTH, MN (KDAL) - Duluth firefighter Heath Wiersma and his dog Kassidy finished 2nd in the Veterans Class at the World Dock Jumping Championships last week in Dubuque, Iowa. Wiersma and Kassidy, a chocolate lab, have been involved in dock jumping for the last 7 years and have competed in events in Minnesota, Iowa, Ohio and Wisconsin. He expects they will take some time off before resuming competition at indoor events in February or March. The World Dock Jumping Championships are organized by Dock Dogs Incorporated and the dogs jump for distance and height from a dock into a body of water. Kassidy's jumps included a 23 feet 4 inch leap in the qualifying rounds.