The Atoms For Peace Historical Marker, located on W. Grand Ave south of S. Bingham Street in Arco, Idaho, commemorates the towns role as the first in the free world to be powered by atomic energy. It represents a significant milestone in nuclear history, demonstrating the potential for peaceful uses of this powerful technology. The reactor built here became an important training and research tool, named after Wm. Breazeale, Penn States first professor of nuclear engineering. This site offers an engaging glimpse into the early days of nuclear technology and its peaceful applications, making it a must-visit destination for anyone with an interest in science or history.