Marvin H. Arnold, Jr.

Lyle M. Crowe

Lyle Crowe worked for the J.A. Jones Construction Company.

C. W. Andersen

Seymour Calvert

Seymour Calvert served for 11 months in the Special Engineering Detachment at Los Alamos. He specialized as a chemical engineer, and carried out experiments with beryllium that were often dangerous.

William Lanouette

William Lanouette is a writer and policy analyst, as well as an expert on the Manhattan Project who has written extensively about the politics of nuclear weapons and power.