In 1971, athletes from Italy, Argentina, Denmark and other countries travelled to Mexico to compete in the Women’s World Cup. More than 100,000 fans showed up to games, and by all accounts, the tournament was a success. But that momentum came to a screeching halt the day the tournament ended, and the event was rarely spoken of again. Until now. The World’s Bianca Hillier reports on a new documentary called COPA 71.