A man from Hadley, Massachusetts, has pleaded guilty to illegally importing and selling Russian plutonium, which he mailed to numerous customers across the United States. Authorities reported that he sold the radioactive material to at least 67 clients and was also found in possession of child pornography. The felon admitted to mailing trace amounts of plutonium under the guise of collectibles and acknowledged his illegal activities involving the sale of this dangerous substance. This case highlights serious legal and safety issues surrounding the importation of radioactive materials.