Overview
The National Security Agency (NSA) and the US Department of Defense (DoD) are two distinct entities within the US government, with the NSA being a part of the DoD. The NSA is responsible for global monitoring, collection, and processing of information and data for global intelligence and counterintelligence purposes, specializing in signals intelligence (SIGINT). In contrast, the DoD is a federal executive department responsible for protecting the United States and its interests through military operations and defense strategies. While the NSA has roughly 32,000 employees, the DoD has over 1.3 million active-duty personnel and 742,000 civilian employees. The NSA's budget is classified, but the DoD's budget for 2022 was over $721 billion. The NSA was formed in 1952 by President Harry S. Truman, while the DoD was established in 1947 through the National Security Act. The NSA reports to the Director of National Intelligence (DNI) and the Secretary of Defense, while the DoD is headed by the Secretary of Defense, who is a member of the President's cabinet. The NSA's primary focus is on signals intelligence, while the DoD's primary focus is on military operations and defense strategies. The NSA works closely with other intelligence agencies, such as the [[central-intelligence-agency|Central Intelligence Agency]] (CIA) and the [[federal-bureau-of-investigation|Federal Bureau of Investigation]] (FBI), to achieve its mission. The DoD, on the other hand, works with other government agencies, such as the [[department-of-state|Department of State]] and the [[department-of-homeland-security|Department of Homeland Security]], to protect the United States and its interests. The NSA's activities are often classified, but it has been involved in several high-profile controversies, including the [[edward-snowden|Edward Snowden]] leaks. The DoD has also been involved in several controversies, including the [[iraq-war|Iraq War]] and the [[afghanistan-war|Afghanistan War]]. In terms of cultural resonance, the NSA has been portrayed in popular culture as a secretive and powerful agency, as seen in movies like [[the-bourne-series|The Bourne Series]] and TV shows like [[homeland|Homeland]]. The DoD, on the other hand, has been portrayed as a symbol of American military power and strength, as seen in movies like [[top-gun|Top Gun]] and TV shows like [[ncis|NCIS]].