AdvertisementThe New World Of Firefighting: Politics, Climate And HumansJuly 07, 2013Liz HalloranfacebookEmailAn aerial tanker drops fire retardant on a wildfire threatening homes near Yarnell, Ariz., on July 1. An elite crew of firefighters was overtaken by the out-of-control blaze on June 30, killing 19 members as they tried to protect themselves from the flames under fire-resistant shields. (AP)