Conn. School Shooting

Police respond to the scene of a shooting at Sandy Hook Elementary School in Newtown, Conn. on Dec. 14, 2012. (credit: CBS 2)

newtownschoolshooting

State police personnel led children from the school, following the shooting. (credit: Newtown Bee Photo, Shannon Hicks)

Shooting At Elementary School In Newtown, Connecticut

Connecticut State Police walk near the scene of an elementary school shooting on December 14, 2012 in Newtown, Connecticut. According to reports, there are more than 20 dead, most children, after a gunman opened fire in at the Sandy Hook Elementary School. The shooter was also killed. (Credit: Douglas Healey/Getty Images)

Elementary School Shooting

Police respond to the scene of a shooting at Sandy Hook Elementary School in Newtown, Conn. on Dec. 14, 2012. (credit: CBS 2)

Shooting At Elementary School In Newtown, Connecticut

Connecticut State Police walk on Dickson Street from the scene of an elementary school shooting. (Credit: Douglas Healey/Getty Images)

Shooting At Elementary School In Newtown, Connecticut

A woman holds a child as people line up to enter the Newtown Methodist Church near the the scene of an elementary school shooting. (Credit: Douglas Healey/Getty Images)

Shooting At Elementary School In Newtown, Connecticut

According to reports, there are more than 20 dead, most children, after a gunman opened fire in at the Sandy Hook Elementary School. shooting. (Credit: Douglas Healey/Getty Images)

Shooting At Elementary School In Newtown, Connecticut

Connecticut State Police walk on Dickson Street from the scene of an elementary school shooting. (Credit: Douglas Healey/Getty Images)

newtown-shooting

School shooting kills more than 20 people, and at least 18 children at Sandy Hook Elementary School in Newtown, Connecticut.