destructive substance

(4) the term “destructive substance” means an explosive substance, flammable material, infernal machine, or other chemical, mechanical, or radioactive device or material, or matter of a combustible, contaminative, corrosive, or explosive nature, except that the term “radioactive device” does not include any radioactive device or material used solely for medical, industrial, research, or other peaceful purposes;


18 USC § 1992(d)(4)

Scoping language

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