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23 of 28 from Boom! Nevada's nuclear legacy (pictures)
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By this stage in the nuclear testing era, the Soviets and the Americans had agreed to allow monitoring of each others' tests. Alongside the icecap site, this small shaft and wiring was meant for the Soviets to measure the test.
July 7, 2012 4:00 AM PDT
Photo by: Daniel Terdiman/CNET
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