Excerpted from The Kennedy Family and the Story of Mental Retardation by Edward Shorter.

NPR: Eunice Kennedy Shriver's Olympic Legacy

Segment the same chart into shorter 10 year periods and the picture tells quite a different story.

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Sometimes this is about content, in terms of shooting in a different way, perhaps using film rather than digital, or medium format, or just using shorter focal length lenses, and at other times it's more about packaging the story in a different way.

BBC: Drowning in pictures

In a shorter format, Julie's story is harder to tell than Amy's, whose bikini does the selling.

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