William Brangham:

Its 10:00 a.m., it's raining. In heavy protective gear, with shovels and masks and goggles, this is how they search for the missing in Paradise, California.

This team was alerted that a missing person might have been here during the fire, and so now they move through the ruins, combing the ash for any trace.

They find what appear to be a few tiny bone fragments. They're gingerly passed around and collected. A forensic anthropologist will be called to determine if they have found what they're looking for.

How do you explain what a forensic anthropologist is?