Glass Illusions owners Pattie and Mark Johnson talk about sculpting glass and metal into petroglyphs, artistic engravings usually on rock.

Photographed and Produced by Corinne O’Donoghue/JSAC Visual Task Force

This article appears in Sep 23-29, 2010.

I am a journalist. I am an editor by heart and a teacher by nature. Photography is a medium in which a story can be told in a single power image, or through a series can take viewers through a visual journey. If...