After the massive Panorama Fire in southern California in 1980, a young fire researcher named Jack Cohen went in to investigate the houses that were destroyed. One of the first things that Cohen did was to listen to emergency dispatch tapes from the day of the fire. And as he listened, he began to notice a pattern. People were calling in about houses on fire long before the fire front ever reached their neighborhoods.The houses were not burning because a wall of flames was racing through the community, destroying them. It was something else: embers. This started Cohen on a crusade to get people to rethink how we fight wildfires.