Elementary school shooting in Connecticut

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Sandy Hook
Parents leave a staging area after being reunited with their children following a shooting at the Sandy Hook Elementary School in Newtown, Conn., about 60 miles (96 kilometers) northeast of New York City, Friday, Dec. 14, 2012. An official with knowledge of Friday's shooting said 27 people were dead, including 18 children. It was the worst school shooting in the country's history. (AP Photo/Jessica Hill)
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Tiroteo en Sandy Hook
A mother runs with her children as police above canvass homes in the area following a shooting at the Sandy Hook Elementary School in Newtown, Conn., about 60 miles (96 kilometers) northeast of New York City, Friday, Dec. 14, 2012. An official with knowledge of Friday's shooting said 27 people were dead, including 18 children. (AP Photo/Jessica Hill)
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Tiroteo en Connecticut
A woman speaks with a Connecticut State Trooper outside Sandy Hook Elementary School after a shooting in Newtown, Connecticut, December 14, 2012. A shooter opened fire at the elementary school in Newtown, Connecticut, on Friday, killing several people including children, the Hartford Courant newspaper reported. REUTERS/Michelle McLoughlin

At least 27 people, including school children, were killed when at least one shooter opened fire at an elementary school in Newtown, Connecticut.