Walter Henry Zinn (December 10, 1906 – February 14, 2000) was a Canadian-born nuclear physicist with the University of Chicago's Metallurgical Laboratory. He worked on the Manhattan Project during World War II, is and credited with starting the world’s first self-sustaining nuclear reaction by withdrawing a control rod from the world’s first nuclear reactor on December 2, 1942 at the University of Chicago.
Walter Henry Zinn (December 10, 1906 – February 14, 2000) was a Canadian-born nuclear physicist with the University of Chicago's Metallurgical Laboratory. He worked on the Manhattan Project during World War II, is and credited with starting the world’s first self-sustaining nuclear reaction by withdrawing a control rod from the world’s first nuclear reactor on December 2, 1942 at the University of Chicago.