A sled dog race that was postponed twice due to unfavorable weather finally got under way Friday, with teams competing over three days for more than $20,000 in prize money.The World Championship Sled Dog Derby originally was scheduled for the weekend of Feb. 8 but was postponed to Feb. 22 because of a lack of snow. By then, the trails were coated with thick ice, and the races were again rescheduled. But last weekend’s snowstorm left a strong base, and organizers said the trail was in great shape as racing began Friday.Read more here: http://www.boston.com/news/local/new-hampshire/2013/03/01/sled-dog-race-begins-after-delays/SSZwyEjVszXhjufMGTwwFK/story.html