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Rosario Ibarra de Piedra, center, leads a march in Mexico City on October 22, 2001 to protest the disappearance of her son, a political activist who vanished in 1975.
Demonstrators hold up pictures of people who have disappeared, including a picture of a man who disappeared in June 2001. According to an Amnesty International report released in June 2002, four people have disappeared since Fox took office in December 2000. The actual number may be much higher since many people are afraid to report to authorities.
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 Jose Luis Magana/Associated Press |

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