Welcome to Tracing Atoms! This blog's creator is Josh McGuffie, a PhD student in the history of science at UCLA (Go Bruins!). Tracing Atoms is the photo dump for my 2016 research trip around the US West. Over a month, I am visiting the six nuclear sites, 10 states, and driving around 4000 miles or about 6400 kilometres. All the photos were taken by, and are property of, the author.