National Museum of Nuclear Science & History
Ernest William Titterton was a British nuclear physicist who worked on the Manhattan Project as part of the British Mission to Los Alamos.
John Shacter was born in Austria and immigrated to the United States after Hitler came to power in Germany.
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.