Iran Shielding Its Nuclear Efforts in Maze of Tunnels William J. Broad, The New York Times

Iran Shielding Its Nuclear Efforts in Maze of Tunnels
William J. Broad, The New York Times
Last September, when Iran's uranium enrichment plant buried inside a mountain near the holy city of Qum was revealed, the episode cast light on a wider pattern: Over the past decade, Iran has quietly hidden an increasingly large part of its atomic complex in networks of tunnels and bunkers across the country.
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http://www.nytimes.com/2010/01/06/world/middleeast/06sanctions.html