This scholarly text focuses on the role of U.S. federal agencies in radiation safety and the evolution of radiation protection regulations. It traces how the principles and practices of radiation protection have changed over time in response to scientific and political developments. The primary purpose is to provide a foundation to the historical background to provide adequate protection against the hazards of radiation to workers exposed in their jobs and to the general public. Portions of this text include: Controversy over regulating medical radiation, Regulating medical uses of radiation, Exploration of some radiation hazards, EPA's revised occupational standards, The Clean Air Act amendments, and more Related products: Other products produced by the U.S. Nuclear Regulatory Commission can be found here: https://bookstore.gpo.gov/agency/nuclear-regulatory-commission-nrc Nuclear Power & Radiation resources collection is available here: https://bookstore.gpo.gov/catalog/nuclear-power-radiation