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A Connecticut State Police officer runs with a shotgun at the Sandy Hook Elementary School in Newtown on Friday, December 14.
A Connecticut State Police officer runs with a shotgun at the Sandy Hook Elementary School in Newtown on Friday, December 14.

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    How the school shooting unfolded

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How the school shooting unfolded

CNN's Susan Candiotti reports on how the Connecticut school shooting happened, leaving dozens of people dead.

How the school shooting unfolded

CNN's Susan Candiotti reports on how the Connecticut school shooting happened, leaving dozens of people dead.