Эхо-Саммит
With the Olympics happening in Mexico City, at high altitude, the effect of the thin air on athletic performance became a factor on world records. This was already a known phenomenon, and the American team was selected by holding the Olympic Trials at high altitude at Echo Summit, California. In 1955, Lou Jones set the world record in the 400 meters at altitude in Mexico City. Following the 1968 Summer Olympics the: