This bill sets forth policies and authorities for FY2026 for Department of Defense (DOD) programs and activities, military construction, and the national security programs of the Department of Energy (DOE). It also authorizes the Defense Nuclear Facilities Safety Board for FY2026. The bill authorizes appropriations but it does not provide budget authority, which is provided by appropriations legislation. Among other elements, the bill authorizes the procurement of various items, including aircraft, ships, and missiles;authorizes active duty and reserve component personnel strength levels;authorizes specified military construction projects and extends the authorization of certain projects from previous fiscal years;requires DOD to develop a strategy on the national security implications of emerging biotechnologies;requires the Navy to implement certain processes to improve the material condition and combat readiness of Navy surface ships maintained and repaired at private shipyards; extends the Pacific Deterrence Initiative (an initiative to enhance U.S. deterrence and defense posture, assure allies and partners, and increase capability and readiness in the Indo-Pacific region) through FY2026; andrepeals various statutory provisions related to diversity, equity, and inclusion within DOD, including a provision establishing the position of Chief Diversity Officer of DOD.For additional information on the National Defense Authorization Act (NDAA) see In Focus IF10516, Defense Primer: Navigating the NDAA, andIn Focus IF10515, Defense Primer: The NDAA Process.