The mission of the American Thoracic Society is to improve health worldwide by advancing research, clinical care, and public health in respiratory disease, critical illness, and sleep disorders. More than 15,000 physicians, research scientists, nurses and other allied health care professionals comprise the membership. The ATS International Conference is the home of pulmonary, critical care, and sleep professionals, from those in the earliest stages of their careers to those whose research or strides in clinical care has gained them international recognition. Each year, nearly 14,000 of these professionals choose to attend, present, and learn about the latest advances, meet with colleagues from around the world, and strike new collaborations. Among the many other specialties represented in sessions at the International Conference are: Allergy/Immunology; Behavioral Science; Cardiology; Environmental and Occupational Health; Infectious Disease; and Pediatric Pulmonary, Critical Care, and Sleep. Nearly half of conference attendees arrive from laboratories and patient care centers beyond the United States.