Samuel Richard "Sandy" Berger was a prominent American political consultant and government official. He served as the United States National Security Advisor for President Bill Clinton from March 14, 1997, until January 20, 2001. During his tenure, he played a key role in shaping U.S. foreign policy, including the Kosovo War and the administration's response to terrorism. After leaving government, he co-founded a strategic consulting firm and remained an influential voice on international affairs until his death.