National Museum of Nuclear Science & History
Nelson worked at the 300 Area at Hanford during the Manhattan Project.
Brawley worked in the United States Engineer District Office.
Seymour Bernstein (1923-2015) was an American chemical engineer who worked on the Manhattan Project. He was a member of the Special Engineer Detachment at Oak Ridge and worked as a laboratory supervisor at the K-25 Plant.
Mars worked for Stone and Webster Engineering Corporation.
John Attanas was born in 1920 and grew up on farm near Kingston, New York. After graduating from Georgia Tech in 1942 with a degree in chemical engineering, he worked in a chemistry lab at the Remington Arms Company.