DEH CHO DRUM -- Peter Hardisty, left, and Brian Martineau take a quick break as a helicopter brings in a new load of equipment to the shores of Harris Creek, where Enbridge is running an oil spill simulation across the water from Fort Simpson. Photo courtesy of Adam Johnson/NNSL photo..>

DEH CHO DRUM -- Peter Hardisty, left, and Brian Martineau take a quick break as a helicopter brings in a new load of equipment to the shores of Harris Creek, where Enbridge is running an oil spill simulation across the water from Fort Simpson. Photo courtesy of Adam Johnson/NNSL photo.