Perfect 10 (gymnastics) same competition, in the vault and floor exercise. Comăneci's coach, Béla Károlyi, having defected to the United States in 1981, subsequently coached Mary Lou Retton to gold at the 1984 Olympics in Los Angeles, where she scored 10s in the vault and floor exercise. The first man to score a perfect 10 in Olympic competition was the Russian Alexander Dityatin, who received the score in the vault on the way to a record-breaking eight medals in the 1980 Olympics in Moscow. Among other men to achieve the score was Comăneci's future husband, Bart Conner, who received two 10s in Los
Equestrian at the 1976 Summer Olympics had to keep some horses home due to veterinary regulations. Overall 23 nations competed: Argentina, Australia, Austria, Belgium, Bolivia, Canada, Denmark, France, Federal Republic of Germany (FRG), Great Britain, Guatemala, Ireland, Italy, Japan, Mexico, Netherlands, Puerto Rico, the Soviet Union, Spain, Sweden, Switzerland, Uruguay, and the US, with the Montreal Games being the first for Guatemala and Puerto Rico in equestrian events. The 1976 Olympics was also the first Games with a disqualification due to a positive equine drug test, after San Carlos, ridden by Ronald McMahon of Ireland, received treatment following an injury during transport. Although the treatment was