Sandy Hook school shooting

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Sandy Hook
A woman waits to hear about her sister, a teacher, 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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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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School shooting
This satellite image provided by Google shows the Sandy Hook Elementary School in Newtown, Conn. A shooting at the school Friday, Dec. 14, 2012, left the gunman dead and at least one teacher wounded. (AP Photo/Google)

A man opened fire Dec. 14, 2012, inside the Sandy Hook, Connecticut elementary school where his mother worked as a teacher, killing 26 people, including 20 children, as youngsters cowered in their classrooms and trembled helplessly to the sound of gunfire reverberating through the building.

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