### Question
Can you define what highly enriched uranium means?


### Answer
**Highly enriched uranium** is defined as the following in *50 U.S.C. § 2302*:

> uranium enriched to 20 percent or more in the isotope U–235

#### Citation:
  - *50 U.S.C. § 2302*
  - Heading: **CHAPTER 40-DEFENSE AGAINST WEAPONS OF MASS DESTRUCTION**

