Slideshow: The Prairie Island nuclear facility
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![Security is tight before entering the plant](https://img.apmcdn.org/e604bf376aa88a7aa1758966f0d4056a8d63df53/uncropped/8e31bd-20090521-plantsecurity.jpg)
Before entering the plant, vehicles are thoroughly searched by security personnel. They are also checked for any radioactive materials.
MPR Photo/Steve Mullis
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