Abstract / DescriptionWhy Society Needs Health Physics: Biological Effects and Challenges Special Session Media Files Building Bridges in Health Physics IAEA - Seibersdorf Pu-240 Incident Indoor Radon Risk IAEA - Occupational Radiation Protection in Latin America Sensitivity of Human Lymphocytes to Low-Dose Radiation Ionizing Radiation Exposure of the US Population IAEA - Orphan sources and Radioactively Contaminated Material in the Metal Recycling Industry