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Some of the deadliest mass shootings around world

Friday, December 14, 2012 | 1:03 p.m. CST; updated 4:47 p.m. CST, Friday, December 14, 2012

A gunman at a Connecticut elementary school killed 27 people, including 20 children on Friday. It is among the world's worst mass shootings. Here is a look at some others:

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