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Extras

Video thumbnail: History Detectives Cromwell Dixon Plane Fragment

History Detectives

Cromwell Dixon Plane Fragment

What could this fabric tell us about the first pilot to conquer the Continental Divide?

Cromwell Dixon Plane Fragment

Video thumbnail: History Detectives Bartlett's Sketchbook

History Detectives

Bartlett's Sketchbook

How did these pencil sketches help define the shape of America?

Bartlett's Sketchbook

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