“Domesticating Uncertainty: The Nuclear Afterlives of Three Mile Island” analyzes the rise and fall of the nuclear industry in the US as it is typified through the life cycle of Three Mile Island Nuclear Power Plant (TMI). In 1979, TMI was the site of America’s most publicized civilian nuclear power accident; today, it is facing its decommissioning, a plant closure that will span sixty years. Drawing on 24 months of ethnographic fieldwork in Central Pennsylvania, I document how residents hosting the midcentury future-building projects of the US nuclear industry came to feel at home with a domesticated weapon of war, and their attempts to live safely, even optimistically, alongside it in its present aftermath. Rather than interpreting decommissioning or the 1979 accident as bounded events, this project tracks the “afterlives” of TMI, its ongoing material, social, and affective impact on my interlocutors’ daily life even as the plant begins its deconstruction. More than a formal act of unbuilding then, my research understands nuclear decommissioning as an ongoing social process with national, environmental, and bodily consequences that generate seemingly contradictory affective attachments to industries that harm. By problematizing plant closure as a realistic goal, my project demonstrates ethnographically the national and local scale of the 1979 accident, as well as the environmental and ethical stakes of the United States’ project to safely decommission roughly 20 plants in the next half century without long-term waste solutions and under timelines that will outlive stakeholders.“Domesticating Uncertainty” argues that it is not only through modes of containment that people come to feel safe living in the shadow of an infamous nuclear power plant. It is also through the inherently boundary-transgressive process of domestication that enables people to feel at home with nuclear power’s strange-making qualities in ways that preempt attention away from the technology’s instability and uncertainty. The technoscientific promise of domestication envisions a world of neat and tidy binaries—war versus peace, the bomb versus the peaceful atom, the home versus the plant, the domestic versus the foreign, the local versus the global. But domestication, as a process that transforms a weapon of war into a civilian energy source to power the white, middle-class home, showcases not only the illusion of these binaries but also Americans’ preoccupation with clinging to them.