William C. Meecham

E. K. Figenbaum

Figenbaum worked for Stone and Webster Engineering Corporation.

Charles Danielian

Sherman Winters

Sherman Winters was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.

Walter Groeger

Walter Groeger worked in the shop at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.