The choice of Mexico City in 1968, for the celebration of the Games of the 19th Olympiad, was met with reluctance from some international federations and many national Olympic committees, worried about the effects that altitude (2,250 m) could have on the behaviour of athletes and the cost of preparing for this adaptation, which poor countries had to give up, which put them at a disadvantage. Everything went according to plan. Fortunately, there were no serious accidents.