By Diane Hope
http://stream.publicbroadcasting.net/production/mp3/knau/local-knau-982057.mp3
Flagstaff, AZ – Everyone's heard the phrase 'take only photos, leave only footprints'. But for some Arizona residents, the art of tracking those footprints is a skill they use to earn a living and to help save lives. For KNAU, Diane Hope reports.