Her leg was pinned beneath a huge concrete beam.

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Basements provide good protection if equipped with a suitable door and a concrete roof, but basements of pier-beam houses would leave their occupants exposed and vulnerable if the structure above them were blown away, said Ernst Kiesling, a former professor of civil engineering at Texas Tech.

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And in the image of Moscow-Sheremetyevo airport, the flat concrete surfaces of the runways appear as black lines because the radar beam has been very efficiently reflected away from the satellite.

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