No one has done more to define the wildland-urban interface problem and empower homeowners to reduce their risk of wildfire than Jack Cohen. His post-fire field examinations and laboratory-based research on fire dynamics led to the concept of the home ignition zone, a phrase he coined. Cohen also co-developed the U.S. National Fire Danger Rating System and contributed to the U.S. fire behavior prediction systems. Jack D. Cohen, Research Physical Scientist, Missoula Fire Sciences Laboratory, U.S. Forest Service, Missoula, Montana