35 years ago today, hundreds of Mexican students were massacred by the Mexican government in Tlatelolco Plaza. New government documents obtained by the Associated Press prove the massacre began when 360 snipers under government commands fired into a crowd of 10,000 students who were protesting the nation’s one-party government and lack of political freedom. The massacre came just a week before the Olympics were to begin in Mexico City. The government has long maintained that armed students provoked the massacre. New evidence has also that future Mexican president Luis Echeverria played a greater role than previously believed in the massacre.