This sounds like something straight out of science fiction. Heather Dewey-Hagborg is an artist who makes 3-D portraits of people using their DNA without their knowledge. She finds the DNA on trash they’ve left behind — cigarette butts, chewed gum, strands of hair — then extracts the genetic information and uses a 3-D printer to re-create their face (that’s her own, above).

How does she do it? Could this be used for identity theft? Is she working on a screenplay for “Face/Off 2”? I asked her all that and more today on my America Weekend show. Listen, then click here to subscribe to these podcasts via iTunes!