Plutonium

Presentation of a sample of Plutonium by Glenn Seaborg
Glenn Seaborg (left) presenting a sample of plutonium to Emilio Segre (right)
Glenn Seaborg and Emilio Segre holding a cigar box containing the first sample of plutonium-239
Glenn Seaborg; Sidney Galler Emilio Segre and Philip Bishop at a ceremony
Glenn Seaborg poses with a sample of plutonium in a laboratory
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