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Photograph of a bomb test at the Nevada Testing Ground.

Photograph of a mushroom cloud over the Pacific Ocean.

Printed pictorial "diploma," certifying that "Charter Heslep Participated in Operation Teapot at Nevada Test Site." The diploma bears the facsimile signature of the various directors of the operation, and the actual penned signature of Richard G.…

Photograph annotated: "Firing of the first atomic shell in the Armies [sic] first atomic canon at the N.P.G."

Image of Mary Julia Ledlie McDonald.

Face of a clay tablet inscribed with records from ancient Babylonia.

Side of a clay tablet inscribed with records from ancient Babylonia.