Shivs, more on display at historic Philly prison - Article Photos 1/13

In this Tuesday, March 12, 2013 photo, shown examples of shanks made by inmates at the Eastern State Penitentiary in Philadelphia. The defunct and decayed prison that serves as one of Philadelphia's quirkiest tourist attractions, plans to displaying dozens of never-before-seen artifacts for 10 days only in a "pop-up museum." (AP Photo/Matt Rourke)