The Nevada National Security Site (NNSS) is a U.S. government facility located in southern Nevada. It was established in 1951 and primarily serves as a testing ground for nuclear weapons and other national security technologies. The site covers approximately 1,360 square miles and includes various testing areas, laboratories, and support facilities. NNSS plays a crucial role in ensuring the safety and reliability of the U.S. nuclear arsenal. It conducts experiments related to nuclear security, environmental management, and emergency response. The site is also involved in nonproliferation efforts and supports research in areas such as energy and defense technology.