Searching the Sky for Alien Laser Messages

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Louisiana Levee Critics Now Less Critical

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NASA Announces Plan to Hit Moon in 2008

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Engineers Blamed in New Orleans Levee Failure

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Panel's Report Assigns No Blame in Levee Failures

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Army Builds Mini New Orleans to Study Levees

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Model Attempts to Recreate New Orleans Levee Failure

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Economists Learn from Game Show 'Deal or No Deal'

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Utah Site Gets License for Nuclear Waste Repository

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E-Mail Encryption Rare in Everyday Use

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Report: Nuclear Waste Transport Poses Few Risks

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Stopped Clocks Tell Tale of Katrina Flooding

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The Challenger Shuttle Tragedy, 20 Years Later

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DuPont Agrees to Reduce Use of Teflon Chemical

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