Central Intelligence Agency or CIA is the leading intelligence-gathering agency of federal government of United States. The headquarters of CIA is found in Langley, Virginia and its employees work from US embassies and other areas in the world. Since it is the only independent US intelligence agency, it reports directly to Director of National Intelligence. However, over the years, CIA secrets had been going around. The list below of CIA operations had gotten the attention of every news agency and the imagination of many.