The World Aquatics Championships, formerly the FINA World Championships, are the World Championships for six aquatic disciplines: swimming, diving, high diving, open water swimming, artistic swimming, and water polo. The championships are staged by World Aquatics, formerly known as FINA, the international federation recognised by the International Olympic Committee (IOC) for administering international competitions in water sports. The championships are World Aquatics' largest and main event traditionally held biennially every odd year, with all six of the aquatic disciplines contested every championships. Dr. Hal Henning, FINA's president from 1972 through 1976, and their first American President, was highly instrumental in starting the first World Aquatics Championships, and in retaining the number of swimming events in the Olympics, which gave an advantage to nations with larger, more balanced swim teams.