National Museum of Nuclear Science & History
Attended the University of Wisconsin.
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.
Hopkins worked at the 200 West Area at Hanford during the Manhattan Project.
John Mendl was a member of the 1st Ordnance Squadron in the 509th Composite Group stationed on Tinian Island in the Pacific.