Chronic obstructive pulmonary disease (COPD) is a long-term lung disease. People with COPD have difficulty breathing because of lung damage. However, for many people with COPD, while some areas of the lungs are damaged, other nearby areas are not. This study will examine lung tissue from people with and without COPD who are undergoing lung transplantation to investigate how and why certain areas of the lungs are damaged in some people but not others.