disabled, INAS-FID athletes were banned from Paralympic competition, but the ban on intellectually disabled athletes has since been lifted. Physical disability Organized sport for persons with physical disabilities existed as early as 1911, when the "Cripples Olympiad" was held in the U.S.A. One of the successful athletes was Walter William Francis, a Welshman, who won both the running and wrestling championships. Later, events often developed out of rehabilitation programs. Following the Second World War, in response to the needs of large numbers of injured ex-service members and civilians, sport was introduced as a key part of rehabilitation. Sport for rehabilitation grew into recreational sport and then into competitive sport. The pioneer of this approach was Sir Ludwig Guttmann of the Stoke Mandeville Hospital in England. In 1948, while the Olympic Games were being held in London, he organized a sports competition for wheelchair athletes at Stoke Mandeville. This was the origin of the Stoke Mandeville Games, from which evolved both the IWAS World Games and the Paralympic Games. The first official Paralympic Games, which were simultaneously the 9th International Stoke Mandeville Games ('international' having been added when Dutch service personnel first took part in the Games in 1952), were held in Rome in 1960. The 2nd, 3rd and 4th Paralympic Games were simultaneously the 13th, 17th and 21st international Stoke Mandeville Games. Sports for persons with physical disabilities began to be organized in the US in the late 1960s through Disabled Sports USA. Disabled Sports USA was established in 1967 by disabled military veterans, including Jim Winthers, to help rehabilitate the injured soldiers returning from Vietnam and originally named the National Amputee Skiers Association. In 1970, Hal O'Leary founded the National Sports Center for the Disabled (NSCD) at Winter Park in Colorado. Today, NSCD has 19 certified instructors and more than 1,000 volunteers. Disabled Sports USA has become one of the largest national multi-sport, multi-disability organizations in the United States, serving more than 60,000 wounded warriors, youth and adults annually. In 1975, the Paralympic Games expanded to include those with limb amputations and visual impairments. Individuals with cerebral palsy were allowed to compete beginning in 1980. Since 1988, the International Olympic Committee has chosen to validate Disabled Sports (physical disabilities) and incorporate it as a part of the Games: the staging of the Paralympic Games immediately follows the Olympic Games. This scheduling helps to foster greater interest in disabled sports.