Coils weighing around 10,000 lbs. stacked and used to make coins at the U.S. Mint on Wednesday, June 27, 2012, in Philadelphia. The new $3.9 million exhibit opens a new tour to visitors on July 3 and ... more 
Coils weighing around 10,000 lbs. stacked and used to make coins at the U.S. Mint on Wednesday, June 27, 2012, in Philadelphia. The new $3.9 million exhibit opens a new tour to visitors on July 3 and it's the first upgrade in more than 40 years.(AP Photo/Brynn Anderson) less 
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Associated Press | Photo By Brynn Anderson
Wed, Jun 27, 2012 4:46 PM EDT