When he set out to build a radiation gun concealed in a van to kill Muslims he deemed “medical waste,” Glendon Scott Crawford had lofty visions of what his weapon would be. “Hiroshima on a light switch,” the Klansman said, before spending years using straw buyers, code names and throwaway “burner” phones to get the necessary hardware. 

The hate site Stormfront and other racist groups have raked in hundreds of new members and tens of thousands of dollars since Dylann Storm Roof’s brutal June 17 killing spree in Charleston, S.C. Now, Florida officials are investigating Stormfront for illegal business activity.

The Ku Klux Klan is a native-born American racist terrorist organization that helped overthrow Republican Reconstruction governments in the South after the Civil War and drive black people out of politics. It revived in the 20th Century as a social lodge and briefly became a nationwide political power.