Given starts with a basic explanation of the SCA and Pennsic, but focuses on the battlefield, in keeping with the Only A Game show's theme of sporting competition. The report covers the Bridge Battle and the Field Battle.
The link above goes to a page containing not only the audio archive, but also photos taken by the NPR team on site.
For those who wish to order a tape of the show, the order form is here:
Editor's Note: If following the link to listen to the story online, start playing the segment at about 39:55 into the program. The Pennsic segment runs about ten minutes in length.