can some tell me or give me an example of what the CIA does?

Question

What kind of work do they do?

The CIA is the United States Central Intelligence Agency. Because it collects information about possible threats to our country, it's been nicknamed the "Spooks" because of its spies.

These sites have more information about it.

https://www.cia.gov/about-cia/index.html

http://en.wikipedia.org/wiki/CIA