CNA_CNA案例研究：美国国防部在Twitter上发布与2021年极端主义退群有关的活动.pdf

September 2021 DISTRIBUTION STATEMENT A.Cleared for Public Release CIM-2021-U-030801-Final Copyright CNA 2021 3003 Washington Boulevard,Arlington,VA 22201|703-824-2000|a.org A Case Study Demonstrating CNAs Social Media Analysis Capabilities:USMC Twitter Activity Relating to the 2021 Extremism Stand-Down Dr.Megan K.McBride,Mr.Rikesh Nana,and Dr.Elizabeth B.Clelan US government institutions,such as the Department of Defense(DOD)and the US Marine Corps(USMC),have long recognized the importance of maintaining a robust social media presence.The DOD(DeptofDefense)has been on Twitter since 2009,has posted more than 32,000 tweets,and has 6.3 million followers;the USMC(USMC)has been on Twitter since 2007,has posted more than 16,000 tweets,and has 1.5 million followers.These robust Twitter accounts are designed to engage with a broad range of interested individuals.Communication on Twitter,though,comes with significant risk:messages can be misinterpreted,disinformation can spread rapidly,and a single poorly chosen word can result in widespread outrage.Each of these risks is a problem in any circumstance but is particularly troublesome when a Twitter user(such as DOD or the USMC)is genuinely