National Museum of Nuclear Science & History
Manning worked for Stone and Webster Engineering Corporation.
Hollis worked for Stone and Webster Engineering Corporation.
Hubert P. Yockey is an American physicist who studied under J. Robert Oppenheimer at the University of California, Berkeley and worked with him during the Manhattan Project.
Alfred Hanson (1914-2005) was an American physicist. Alfred Hanson came to the Manhattan Project from the University of Wisconsin where he had recently completed his doctoral work, studying the Van de Graaf “long tank” accelerator.