And other countries, though not part of this structure, are still sensitive to what is going on in Syria.

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Infrared cameras and other technology monitor for unauthorized activity in sensitive areas of the structure, including doors to equipment chambers.

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"It's a very, very significant and important monument and we want to make sure that in any relocation that it is properly relocated in a sensitive way and that the structure is in no way harmed or interfered with, " said Mr Walters.

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Just as crucial for rosy growth and tax-receipt projections, Obamanomics assumes that top marginal tax rates will rise--hammering one of the most sensitive drivers of the private-sector incentive structure--but with no subsequent decline in work effort, innovation or growth rates.

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Second, they have to structure the combination so that U.S. regulators are convinced there are no problems with the handling of sensitive information.

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