The PBS Frontline documentary “American Insurrection” investigates the violent mob that stormed the U.S. Capitol on January 6, 2021. Pure Nonfiction host Thom Powers interviews the director Rick Rowley who collaborated on the project with correspondent A.C. Thompson of ProPublica and the Berkley Center for Investigative Journalism. Rowley discusses what he’s learned from studying vigilante groups such as the Proud Boys and the Boogaloo Boys and reflects on the historic link between America’s foreign wars and the rise of homegrown militias.

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