Pan American Games Aires in 1940, the participants decided that the first games should be held in Buenos Aires in 1942. The plans had to be postponed because of World War II. A second Pan American Sports Congress held in London during the 1948 Summer Olympics reconfirmed Buenos Aires as the choice of host city for the inaugural games, which were held in 1951. The games offered 18 sports. Countries that were part of the Commonwealth of Nations such as Canada did not compete at the first Pan American Games. The second games were held in Mexico City, Mexico. Competitions started on March
2018 G20 Buenos Aires summit 2018 G20 Buenos Aires summit "" The 2018 G20 Buenos Aires summit, was the thirteenth meeting of Group of Twenty (G20), which was held on 30 November and 1 December 2018 in the city of Buenos Aires, Argentina. It was the first G20 summit to be hosted in South America. President Mauricio Macri of Argentina assumed the one-year G20 presidency on 30 November 2017, during an official ceremony at the Kirchner Cultural Centre in Buenos Aires. President Xi Jinping of China (2016 host), Chancellor Angela Merkel of Germany (2017 host), and Prime Minister Shinzō Abe of Japan (2019 host) all