it depends on the type of cia agent. Lots of paper work but they basicly find out about any threats that pose on the United States. They work off U.S soil while the F.B.I works on U.S soil
A cia officer or agent's center of motivation(motive) is to collect foreign intelligence and information to provide the United States policy makers(politicians/congress) information for them to...
it depends on which section of the CIA you are in because they are not all spys there is the annalist the spy (clandestine service) the engineer and many others that make the CIA a great place to work