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3. 18 U.S.C. § 922;Brady Handgun Violence Prevention Act of,1993
4. “Behind the Mug Shot Grin”: Uses of madness-talk in reports of Loughner's mass killing;Coverdale;Journal of Communication Inquiry,2013
5. Increase in suicide in the United States, 1999–2014;Curtin;NCHS Data Brief,2016