In 1968, when Mexico hosted the Olympic Games in the capital, there were widespread demonstrations against spending so much on such an event, when there were higher national priorities. University students participated in a major way in these demonstrations, with the government reacting violently in the Tlatelolco massacre of October 1968. In June 1971, there was further student activism in Mexico City that resulted in more violent government repression, known as the Corpus Christi massacre. Recognizing that failures in the educational system was a cause of the 1968 student activism, the government of Gustavo Díaz Ordaz (1964–1970) attempted to implement educational reform as part of a wider social reform. The government sought to reach Mexicans who had not had access to education previously and the use of radio and television were seen as ways to do this. Adult education became a focus of the expansion. With the presidency of Luis Echeverría (1970–1976), the expansion included the use of telenovelas (soap operas) to shape public understandings, and Mexico became a pioneer in the use of this medium for policy matters. Better health care in earlier years had resulted in a population boom as infant mortality declined and fertility increased. With Catholic Church opposition to birth control, the secular format of telenovela were a means to bring a message of the benefits of family planning to women.