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Toulouse, France Shootings (2012)

Timeline: Deadly Mass Killings

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A gunman at a Connecticut elementary school killed 26 people, including 20 children, on Friday. It is among the world's worst mass shootings. Here is a look at some others:

The Worst Mass Shootings In Connecticut History

March 7, 1998: Matthew E. Beck, a state lottery accountant for the Connecticut State Lottery, shot and killed four senior lottery officials before committing suicide.

August 3, 2010: Hartford Distributors Inc. truck driver Omar Thornton shot and killed eight of his co-workers in Manchester, before killing...