The managers, as was true of the majority report and the independent counsel referral (ph) before that build their theory in this case not only any pillars of obstruction, but on shifting sand castles of speculation.

CNN: Transcript: White House Counsel Ruff's opening statement

Houses built on shifting sand, very badly.

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Stony ridges gave way to tumbled boulders, slopes of sifted gravel, and then sand, blown into shifting dunes.

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Shifting constantly, the mighty mountains of sand are born when a few grains collect around a nest of grass.

BBC: The ghostly shore of Namibia��s Skeleton Coast

Movement in the Alvord is so slight as to be almost imperceptible--sand dunes on its eastern side are shifting.

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