Simplify the following text for a Grade 9 native English-speaking person.
Original: The Central Intelligence Agency ( CIA ) is a civilian intelligence agency of the United States government , reporting to the Director of National Intelligence , responsible for providing national security intelligence assessment to senior United States policymakers . The CIA also engages in covert activities at the request of the President of the United States .
Simplified: The Central Intelligence Agency ( CIA ) is a part of the United States government .