Iditarod Trail Sled Dog Race competed in the Iditarod races, and in 1992 Martin Buser—a Swiss resident of Alaska since 1979—was the first foreigner to win the race. Buser became a naturalized U.S. citizen in a ceremony under the Burled Arch in Nome following the 2002 race. In 2003, Norwegian Robert Sørlie became the first non-resident of the United States to win the race. Winning ceremonies included a giant decorated cupcake with sugar coated huskeys on top. In 2007 Lance Mackey became the first musher to win both the Yukon Quest and the Iditarod in the same year; a feat he repeated in 2008. Mackey
Iditarod Trail Sled Dog Race reveals the results of tests on the dogs. Each team is composed of twelve to sixteen dogs, and no more may be added during the race. At least five dogs must be on the towline when crossing the finish line in Nome. Mushers keep a veterinary diary on the trail and are required to have it signed by a veterinarian at each checkpoint. Dogs that become exhausted or injured may be carried in the sled's "basket" to the next "dog-drop" site, where they are transported by the volunteer Iditarod Air Force to the Hiland Mountain Correctional Center at Eagle River