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Book Looks at Inventors and Obscure Geniuses

Historian Harold Evans talks about great inventions by Americans. Evans' book, They Made America, profiles well-known inventors, and some obscure geniuses — the inventors of the gas mask, the credit rating and the retail franchise. Hear Evans and NPR's Steve Inskeep.

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Steve Inskeep
Steve Inskeep is a host of NPR's Morning Edition, as well as NPR's morning news podcast Up First.