COPD and lung cancer are two of the most common pulmonary diseases encountered in clinical medicine. However, knowledge about the linkage between these two diseases is in its infancy. In part, this knowledge deficit is understandable because the biology of lung cancer has historically been researched by oncologists who have not focused on airflow obstruction and dynamic hyperinflation, or the difference between emphysema and chronic bronchitis pathogenesis. Our great hope was that the “War on Cancer” would solve the global problem of cancer without the pulmonary community getting involved. We make the diagnosis and then pass the baton.