A Gallery of Kids Who've Died On ATVs

Knox died at the age of seven while riding a 4-wheeled ATV on May 29, 2007. The ATV crushed the boy's abdomen after he fell into a deep ditch while on vacation in Minnesota. "The worst mistake of our lives will be underestimating the danger of such a large and powerful machine," say his parents. (Courtesy Concerned Families for ATV Safety)