2nd Worst Massacre in US history: Dozens killed, most victims aged 5-10

It's one of the worst school shootings in US history. At least 27 people gunned down in a US primary school in Connecticut - twenty of them young children. Pupils had tried to hide from the killer in classrooms and closets, but the bloodbath ended only when he turned the gun on himself. A woman believed to be his mother was also found dead at her house.

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