Defense Agencies. TITLE XXV—International programs Subtitle A—North Atlantic Treaty Organization Security Investment Program Sec. 2501. Authorized NATO construction and land acquisition projects. Sec. 2502. Authorization of appropriations, NATO. Subtitle B—Host Country In-Kind Contributions Sec. 2511. Republic of Korea funded construction projects. TITLE XXVI—Guard and Reserve Forces facilities Sec. 2601. Authorized Army National Guard construction and land acquisition projects. Sec. 2602. Authorized Army Reserve construction and land acquisition projects. Sec. 2603. Authorized Navy Reserve and Marine Corps Reserve construction and land acquisition projects. Sec. 2604. Authorized Air National Guard construction and land acquisition projects. Sec. 2605. Authorized Air Force Reserve construction and land acquisition projects. Sec. 2606. Authorization of appropriations, National Guard and Reserve. TITLE XXVII—Base realignment and closure activities Sec. 2701. Authorization of appropriations for base realignment and closure activities funded through Department of Defense Base Closure Account. TITLE XXIX—Overseas contingency operations and emergency military construction Subtitle A—Overseas contingency operations military construction Sec. 2901. Authorized Army construction and land acquisition projects. Sec. 2902. Authorized Navy construction and land acquisition projects. Sec. 2903. Authorized Air Force construction and land acquisition projects. Sec. 2904. Authorized Defense Agencies construction and land acquisition projects. Sec. 2907. Authorization of appropriations. Subtitle B—Emergency military construction Sec. 2911. Authorization of emergency supplemental appropriations for military construction projects. DIVISION C—Department of Energy National Security Authorizations TITLE XXXI—DEPARTMENT OF ENERGY NATIONAL SECURITY PROGRAMS Sec. 3101. National Nuclear Security Administration. Sec. 3102. Defense environmental cleanup. Sec. 3103. Other defense activities. Sec. 3104. Nuclear energy. TITLE XXXII—DEFENSE