This Is a .223-Caliber Rifle

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Today a gunman at Sandy Hook Elementary School allegedly used a .223 caliber rifle to kill at least 27 people, including many children. The video below, courtesy of YouTube user KENFL74, shows a Bushmaster AR-15 shooting .223 ammunition. Many different kinds of guns use this caliber, of course; this is just one example. CNN, however, reports that a .223 Bushmaster was found on the sceneGuns and Ammo has made the case for why AR-15 guns are ideal "home defense" weapons, saying that military-style guns like the AR-15 have always been popular in the U.S. The guns are certainly popular on YouTube, where children of various ages can be seen firing them. For more information on the shooting in Newtown, Connecticut, see the Atlantic Wire's live updates

Update 9:50am, December 17, 2012: The New York Times reports that Adam Lanza used a .223 caliber AR-15 style rifle manufactured by Bushmaster to kill students and teachers at Sandy Hook Elementary School. 

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Kasia Cieplak-Mayr von Baldegg is the executive producer for video at The AtlanticMore

Cieplak-Mayr von Baldegg's work in media spans documentary television, advertising, and print. As a producer in the Viewer Created Content division of Al Gore's Current TV, she acquired and produced short documentaries by independent filmmakers around the world. Post-Current, she worked as a producer and strategist at Urgent Content, developing consumer-created and branded nonfiction campaigns for clients including Cisco, Ford, and GOOD Magazine. She studied filmmaking and digital media at Harvard University, where she was co-creator and editor in chief of H BOMB Magazine.

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