### Question
Can you define what destructive substance means?


### Answer
**Destructive substance** is defined as the following in *18 U.S.C. § 1992*:

> 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

#### Citation:
  - *18 U.S.C. § 1992*
  - Heading: **PART I-CRIMES > CHAPTER 97-RAILROAD CARRIERS AND MASS TRANSPORTATION SYSTEMS ON LAND, ON WATER, OR THROUGH THE AIR**

