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
Buenos Aires Underground on the Buenos Aires Underground became particularly prevalent in the late 2000s and early 2010s, and by 2013, four out of every five cars on the network had some degree of graffiti. By January 2015, all the painted cars had been cleaned by night-time cleaning teams using a product specially developed for SBASE which allowed the removal of graffiti without damaging the livery of the cars. Cleaning the 410 vandalised cars had cost the City of Buenos Aires AR$ 10.25 million, while a coat of anti-graffiti paint has been applied to the cars to make future cleaning easier using alcohol.