A National Intelligence Estimate (NIE) is a formal assessment produced by the United States intelligence community. It provides a comprehensive analysis of a specific national security issue, integrating information from various intelligence agencies. The goal is to inform policymakers about potential threats and opportunities. NIEs are typically used to evaluate issues such as terrorism, nuclear proliferation, or geopolitical conflicts. They are crafted through collaboration among agencies like the CIA and NSA, ensuring a wide range of perspectives and expertise are considered. This helps leaders make informed decisions based on the best available intelligence.