This striking photograph captures a cautionary radiation sign within the historic B Reactor at Hanford, Washington. Once a key site in the Manhattan Project, the reactor's restricted areas required strict access protocols to protect workers from radiation exposure. The yellow sign, warning of contamination, offers a haunting reminder of the delicate balance between scientific progress and safety. Behind the barrier, the industrial components convey the reactor’s vital role in plutonium production while highlighting the intricate and potentially hazardous environment that workers navigated to maintain this groundbreaking facility.