National Museum of Nuclear Science & History
Barr worked for Stone and Webster Engineering Corporation.
Dr. Henry Lewis Barnett was born in Detroit, Michigan in 1914. He earned a Bachelor of Science degree at Washington University in 1934, and his medical degree in 1938.
Mearns worked in the 100 D Area at Hanford during the Manhattan Project.
Helen D. Thomson was in the Army Group at the Metallurgical Laboratory in Chicago during the Manhattan Project.
