US white supremacists, but we have our share of home-grown equivalents.

In May, federal agents searching the Tampa home of 21-year-old Brandon Russell discovered an array of explosives and bomb ingredients: fuses made from rifle shells, a white cake-like explosive substance called HMTD, more than one pound of ammonium nitrate and other explosive precursors, and two different kinds of radioactive material. The agents promptly arrested Russell, who was both a member of the Florida National Guard and a leader of Atomwaffen, a small fascist group calling for a “white revolution in the 21st century.”

Source: White Supremacists Share Bomb-Making Materials in Online… — ProPublica