 The primary endpoint of this study will be a change from baseline testing to week 28 testing in the A-adO2 at end exercise on a 6 minute walk. At baseline evaluation, subjects will undergo full pulmonary function testing, a blood draw for the beryllium lymphocyte proliferation test BeLPT, 6 minute walk, chest x-ray, and quality of life and dyspnea questionnaires. Follow-up full pulmonary function testing, rest and end exercise A-ad02, pulse oximetry with total distance workload achieved on a 6 minute walk, and chest radiograph will be measured at week 12. Final outcome measurements same as baseline testing, including bronchoscopy with BAL, will be repeated at week 28. A follow-up appointment will be scheduled at week 40 to assess patients general health, as well as measure rest and end exercise A-ad02 and pulse oximetry with 6 minute walk, pulmonary function test, QOLdyspnea scoring, and chest radiograph interstitial lung opacity profusion score. 