Due to federal restrictions contained in the current National Defense Authorization Act, citizens of the People's Republic of China-including the special administrative regions of Hong Kong and Macau-as well as citizens of the Islamic Republic of Iran, the Democratic People's Republic of Korea (North Korea), and the Russian Federation, who are not Lawful Permanent Residents ("green card" holders) are prohibited from accessing facilities that support the mission, functions, and operations of national security laboratories and nuclear weapons production facilities, which includes Los Alamos National Laboratory. MST-7 is involved in many research programs, such as inertial confinement fusion, nuclear weapons programs, including core and enhanced surveillance, directed stockpile and lifetime extension programs, global security, homeland defense, and civilian applications of materials technologies.