20 children killed in school shooting

Unidentified people react on December 14, 2012 at the aftermath of a school shooting at a Connecticut elementary school that brought police swarming into the leafy neighborhood, while other area schools were put under lock-down, police and local media said. Local media quoted that the gunman had died at the Sandy Hook Elementary School in Newtown, Connecticut, northeast of New York City. At least 27 people, including 18 children, were killed on Friday when at least one shooter opened fire at an elementary school in Newtown, Connecticut, CBS News reported, citing unnamed officials. AFP PHOTO/DON EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)

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    20 children killed in school shooting

CNN's Ashleigh Banfield reports from the scene of the Sandy Hook elementary school shooting.