Collin Plank (right), an earth scientist with the engineering consultant contractor AECOM, shares rocks samples with members of the community participating in a Bulk Fuels Facility field trip April 18 near Tijeras Arroyo, south of the Albuquerque International Sunport. Plank was a member of a team of specialists helping participants to understand hydrology as it relates to the BFF contamination plume. (U.S. Air Force photo by Jim Fisher)