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
Trams in Buenos Aires February 1963, just a few days after the 100-year anniversary of the first tram in Buenos Aires. Most of the tram services saw direct replacements with the hundreds of buses purchased by the Government of Argentina from Leyland Motors. The Buenos Aires PreMetro is a 7.4 km-long tram line which opened in 1987 with the intention of it functioning as a feeder service for Line E of the Buenos Aires Underground. It is currently operated by the private company Metrovías, who also operate the Underground and the Urquiza Line in the city. It uses Argentine-built Materfer trams, though for a