Louis Slotin’s pass photograph. Los Alamos Historical Society Photo Archives.
Louis Slotin started working on the Manhattan Project in Chicago in 1942 and came to Los Alamos in 1944. Slotin assembled the core of the Gadget at Trinity—if you have seen photos from the Trinity Test, you have probably seen him in them.
On May 21st, 1946 Louis Slotin was killed in a nuclear criticality accident. Slotin worked on a team involved with experiments meant to study nuclear materials at the edge of a nuclear chain reaction, without fully bringing the fissile materials to criticality.
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