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Old 04-07-2012, 03:13 AM
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Default Obama Embraces National Security as Campaign Issue
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Old 05-25-2012, 10:05 AM
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Post 'Cloaking' idea traps a rainbow
A grid of 25,000 "invisibility cloaks" shows how to slow light down and spread out its constituent colours in an advance dubbed "trapping a rainbow".

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