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- A new documentary, "Against All Enemies," explores the link between military veterans and extremism.
- Producer Ken Harbaugh told Insider veterans looking for purpose are at risk of radicalization.
- Groups like the Proud Boys, Oath Keepers, and Three Percenters attempt to recruit veterans.
Of the more than 1,000 people who were charged with a crime for their participation in the January 6 attack on the Capitol, nearly 1 in 5 was a US military veteran.