THIS STORY HAS BEEN FORMATTED FOR EASY PRINTING

At this mine, the precious nuggets go in

Slices of US past, key data preserved

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By Robert Weisman
Globe Staff / September 2, 2008

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BUTLER COUNTY, Pa. - Mine foreman Chuck Doughty steers his golf cart through a vast labyrinth of limestone tunnels, passing armed guards, bulging gray walls studded with dynamite holes, and storage vaults the size of Wal-Marts. (Full article: 1183 words)

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