by a draw. In the 20th century, time limits were set for matches. For more than forty years into the twentieth century, freestyle and its American counterpart, collegiate wrestling, did not have a scoring system that decided matches in the absence of a fall. The introduction of a point system by Oklahoma State University wrestling coach Art Griffith gained acceptance in 1941 and influenced the international styles as well. By the 1960s international wrestling matches in Greco-Roman and freestyle were scored by a panel of three judges in secret, who made the final decision by raising colored paddles at the match's end. Dr. Albert de Ferrari from San Francisco who became vice president of FILA (now UWW), lobbied for a visible scoring system and a rule for "controlled fall", which would recognize a fall only when the offensive wrestler had done something to cause it. These were soon adopted internationally in Greco-Roman and freestyle. By 1996, before a major overhaul of FILA rules, an international freestyle match consisted of two three-minute periods, with a one-minute rest between periods. Today, wrestlers from post-Soviet states, Iran, the United States, Bulgaria, Cuba, Turkey, and Japan have had the strongest showings. Alexander Medved of Belarus won 10 world championships and three Olympic gold medals from 1964 to 1972. Many collegiate wrestlers have moved on to freestyle competition, particularly internationally with great success. In the spring of 2013, the International Olympic Committee (IOC) voted wrestling out of the core sports for the summer Olympics beginning in 2020 As a result of this news the wrestling community started a massive campaign in order to reinstate the sport. A largely online group called 2020 vision lead the movement. They had several campaigns as well as Facebook and Twitter pages that spread awareness and gathered support for the cause of wrestling's return to the Olympics. They had a mission of gaining 2,000,020 signatures (online and offline) in support of wrestling's return to the Olympic Games. In September 2013 the IOC voted to allow wrestling back into the Olympics for 2020 and 2024 as a probationary sport. In order to achieve this, UWW made several changes to the rules as well as changes to the weight classes. There are also discussions about uniform changes as well as changes to the competition mat. Weight classes Currently, international men's freestyle wrestling is divided into six main age categories: schoolboys, cadets, novice,