参考资料: 1、Giffords Law Center,《As more laws are weakened to allow the carrying of openly visible firearms in public, the threat of violence to the public rises alarmingly。》, https://giffords.org/lawcenter/gun-laws/policy-areas/guns-in-public/open-carry/#footnote_33_5645
2、Gallup,《Americans‘ Recent Attitudes Toward Guns》, https://news.gallup.com/opinion/gallup/393092/americans-recent-attitudes-toward-guns.aspx 3、BBC,《America‘s gun culture - in seven charts》, https://www.bbc.com/news/world-us-canada-41488081 4、Brady,《Gun Violence is racial justice issue》, https://www.bradyunited.org/issue/gun-violence-is-a-racial-justice-issue 5、Fortune,《Lobbying by gun rights groups hit a spending record in 2021。 They outspent gun control by more than 5x》, https://fortune.com/2022/05/25/nra-contributions-politicians-lobbying-gun-rights-groups-record-2021-ted-cruz/
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