Congressional red team discovers that it's trivial to acquire all the materials for a dirty nuke

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And for those who haven’t:
The shiny, blue crystals brought pain and death: The strange and heart-wrenching story of how a town in Brazil ended up contaminated with radioactive cesium chloride.

And while we’re at it, there’s always this savory classic:
The Radioactive Boy Scout: When a teenager attempts to build a breeder reactor