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Warnings outside the Iowa House of Represenatives Visitors Gallery

Des Moines, Iowa - A sign outside the House of Representatives visitors gallery at the Iowa state capitol building warns visitors not to hold demonstrations or use flash cubes. Flash cubes were used mostly in the 1960s and 1970s before affordable electronic flash units were developed.

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Image Description:	Des Moines, Iowa - A sign outside the House of Representatives visitors gallery at the Iowa state capitol building warns visitors not to hold demonstrations or use flash cubes. Flash cubes were used mostly in the 1960s and 1970s before affordable electronic flash units were developed.
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