The daunting task of identifying victims of the Camp Fire

In the 11 days since Northern California's Camp Fire ignited, residents have experienced “hell on earth." Firefighters have now contained about 66 percent of the fire. But as rain approaches, rescuers scramble to locate the nearly 1,000 people still missing--fearing that piles of ash will become treacherous mud. William Brangham speaks with Jim Wood, a forensic dentist helping to identify victims.