A nuclear program refers to a country's efforts to develop and manage nuclear technology, which can be used for various purposes, including energy production and scientific research. These programs often involve the enrichment of uranium or the processing of plutonium, which are essential for creating nuclear fuel. Some nations pursue nuclear programs for military purposes, leading to the development of nuclear weapons. International treaties, such as the Non-Proliferation Treaty, aim to prevent the spread of nuclear weapons and promote peaceful uses of nuclear energy. Countries with established nuclear programs include the United States, Russia, and China.