A 40-year-old, Hispanic Marine Corps warrant officer presented to the Walter Reed Army Medical Center Pulmonary Clinic with a 3-month history of progressive shortness of breath and scant hemoptysis. He is an otherwise healthy man who runs five miles a day. He noticed slowing down on his five-mile runs due to shortness of breath, and at the end of his exercise would cough up scant amounts of bright red blood. He denied any other systemic symptoms and was not taking any prescribed or over-the-counter medications. He has no medical or surgical history and denies a smoking history. He has served for the Marine Corps as a liaison officer for 15 years.