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National Park ServicePort Chicago anniversary event at the chapel in 2003
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Military prison under construction on Alcatraz.  

Did You Know?
In 1909 the U.S. Army began construction on the largest reinforced concrete structure in the world - a new military prison necessary because of a large influx of U.S. soldiers convicted of crimes in the Philippines. This building would become the famous U.S. Penitentiary Alcatraz in 1934.

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Last Updated: July 25, 2006 at 00:22 EST