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Sources say close to 30 people were killed, many of whom were children, during a school shooting the Sandy Hook Elementary School in Newton, Conn.
Take a look at some of the worst mass shootings in U.S. history.
A magnitude 8.2 earthquake struck off the coast of Russia Thursday night.
An accident involving a hotel shuttle bus has left at least 16 people injured outside Atlanta's Hartsfield-Jackson International Airport, police said.