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"Guns in America | Facts and Statistics about Firearms in the USA." Guns in America | Facts and Statistics about Firearms in the USA. Web. 02 June 2014.
Krouse, William. "Gun Control." Gun Control. 3 Oct. 2002. Web. 18 May 2014.
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"Worst Mass Shootings in U.S." Cnn. CNN, 26 Sept. 2013. Web. 5 June 2014.