### Question
What is the definition of destructive substance?


### Answer
The definition of **destructive substance** is as follows in *18 U.S.C. § 31*:

> an explosive substance, flammable material, infernal machine, or other chemical, mechanical, or radioactive device or matter of a combustible, contaminative, corrosive, or explosive nature

#### Citation:
  - *18 U.S.C. § 31*
  - Heading: **PART I-CRIMES > CHAPTER 2-AIRCRAFT AND MOTOR VEHICLES**

