Dee McCullough began working as an instrument technician at Hanford in early 1944. As a former sound engineer, McCullough was tasked with installing nuclear safety monitors on the reactors at Hanford. McCullough, who worked closely with many of the famous scientists at the Manhattan project, discusses his interactions with Enrico Fermi and Leona Woods Marshall. In addition, he talks about the various safety methods DuPont put in place to protect their workers.