### Question
What does operational files mean?


### Answer
**Operational files** has the following meaning in *50 U.S.C. § 3143*:

> files of the National Reconnaissance Office (hereafter in this section referred to as "NRO") that document the means by which foreign intelligence or counterintelligence is collected through scientific and technical systems

#### Citation:
  - *50 U.S.C. § 3143*
  - Heading: **CHAPTER 44-NATIONAL SECURITY > SUBCHAPTER V-PROTECTION OF OPERATIONAL FILES**

