Oath Of Secrecy - from our story 'How Superman and Stetson Kennedy Took Down The Klu Klux Klan In 1940s Florida'

February 1947: Stetson Kennedy, author of the Ku Klux Klan study 'Southern Exposure', posing in the Klan's uniform to illustrate the sign of the cross made before the altar at KKK meetings. (Photo by Keystone Features/Getty Images)

February 1947: Stetson Kennedy, author of the Ku Klux Klan (KKK) study ‘Southern Exposure’, posing in the Klan’s uniform to illustrate the sign indicating the Oath Of Secrecy. (Photo by Keystone Features/Getty Images)

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