National Museum of Nuclear Science & History
Keplinger worked in the 100 D Area at Hanford during the Manhattan Project.
Alvin Graves (1909-1965) was an American physicist. Graves was invited to join the University of Chicago Metallurgical Laboratory and in 1942 he accepted the position and became a member of the Manhattan Project.
Clarke worked in the United States Engineer District Office.
Leo Seren (1918-2002) was an American physicist. Seren (in photo, first row standing, far right) was born on May 9, 1918.