The primary reason for excluding these phases was that the Olympic Committee was considering dropping the sport of eventing from the Olympics because of the cost and large area required for the speed and endurance phase with a steeplechase course and several miles of roads-and-tracks. To prevent the elimination of the sport from the Olympics program, the "short format" was developed by the FEI. The last Olympic Games that included the long, or "classic", three-day format was the 2000 Summer Games in Sydney, while Rolex Kentucky, the Badminton Horse Trials, and Burghley Horse Trials ran their last long format three-day in 2005. The short format is now the standard for international competition, such as the Olympics and World Equestrian Games. The change in format has brought about controversy. Some riders support the continuation of the classic format, believing it is the "true test of horse and rider". Others believe the classic format is superior because it teaches horsemanship, due to the extra preparation needed to condition the horse and the care required after the several miles of endurance day. However, others prefer the short format, as they believe it saves wear-and-tear on their horses and allows the horse not only to compete in more three-day events each season, but decreases the chance of injury to the horse. However, this claim has not held true in several recent studies that compared injuries sustained in classic and in short format competitions over equivalent courses. Further, some research indicates that horses are more stressed by the short format than by the careful warm-up inherent in the classic format. Regardless, many upper-level riders prepare their horses for the short format using the same conditioning and training as for the long format. The short format has also been widely urged by breeders of heavier, warmblood-type horses. The long format has remained popular at the Novice and Training levels in the United States, and with riders who feel it maximizes horsemanship. Before the beginning of a three-day event, and also before the last phase, horses are inspected by a vet to ensure that they are fit to compete further. It is usually a formal affair, with well-groomed and braided horses, and nicely dressed riders. It is also a very nerve-wracking time, as the "pass" or "fail" determines whether the horse may continue with the competition. A vet can request that a horse be sent to the holding box, where it will then be re-assessed before being allowed to continue.