Trying to shield profits from so large a tax bite has led to all manner of corporate abuses.

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Other insurers, including Aetna and Blue Shield of California, have also announced large premium hikes.

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To shield themselves from further tax hikes, large corporations would likely argue that the success of small businesses is directly related to that of their bigger brethren.

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The prototype shield presented at the conference is too large to be useful (it would have to be carried around in a backpack), but the technology can eventually be miniaturized to the size of a bracelet.

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