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Image gallery: Data centers go underground

By Robert L. Mitchell
July 28, 2009 06:00 AM ET

This gallery accompanies our story Data centers go underground.

The main entrance to InfoBunker's underground facility is a four-inch-thick, 4.5-ton main blast lock. It serves both as a secured entrance and as a very heavy-duty person-trap. Visitors must pass through two doors that are interlocked. One will not open before the other is closed and sealed.

InfoBunker blast lock

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