CIA has many clandestine, (secret) operations. Some CIA employees have been killed during their work. Their names are on a CIA memorial with a star for them, but some of the names are still secret. The number of stars is deliberately inaccurate.
The CIA also uses open sources to gather information. Analysts read foreign newspapers and watch foreign news broadcasts to learn information, which can be pieced together to make a conclusion.
Several James Bond films (featuring the CIA agent Felix Leiter)
References
↑ Cazorla, Frank, G. Baena, Polo, David, Reder Gadow, Marion (2019) The Governor Louis de Unzaga (1717-1793) Pioneer in the birth of the United States. Foundation. Malaga. pp. 77-84