How do we understand the ecological role of fire? What does "catastrophic fire" mean? How have fire suppression and climate change contributed to the types of wildfires we are seeing ever more frequently? When should one let a fire burn? Fire scientist Rod Linn and journalist Kyle Dickman know catastrophic fires first hand. One makes sophisticated, computationally intensive models of fires; the other used to fight as a hotshot fire fighter them and now writes about them.