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Video: Mexico’s unsolved massacre

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Remembering Mexico City’s 1968 massacre

October 2 is an auspicious date in Mexico, when the nation remembers the bloody massacre of 1968.

That was when Mexican security forces opened fire on a public square crowded with thousands of democracy activists.

No one knows for sure how many people were killed and to this day, no one has been punished for the crime.

Franc Contreras reports from Mexico City.