Raymond Sheline was a chemist who worked on the Manhattan Project at Columbia University, Oak Ridge, and Los Alamos. Sheline received his Ph.D. from the University of California at Berkeley in 1949 and was a professor at Florida State University for 48 years. Among other accomplishments, he helped establish a nuclear chemistry lab at the Niels Bohr Institute in Copenhagen and published more than 400 scientific papers. In this lecture, Sheline discusses how he initially joined the Manhattan Project, his work on gaseous diffusion at Columbia University under Nobel Prize winner Harold Urey and how he became a member of the Special Engineer Detachment. He also delves into the history of nuclear physics, providing an overview of key discoveries and personalities including J. Robert Oppenheimer, Enrico Fermi, and Edward Teller.