Additional Study Information: Are you a current or former smoker? Do you want to know more about your lung health? The FAR-ILD study is designed to detect and study the earliest stages of ILD in at-risk adults, including older smokers. FAR-ILD is a non-interventional study. This means that FAR-ILD is not involved in testing any new interventions or therapies. The purpose of FAR-ILD is to gather data on adults at risk for developing ILD over a long period of time in order to help physicians and investigators better understand interstitial lung disease. There is no cost associated with participating in FAR-ILD and your insurance will not be billed. All study procedures are paid for in full by the National Institute of Health. If you enroll in the FAR-ILD study, you may be asked to undergo the following study-related procedures: CAT scan, Pulmonary Function Testing, blood draw from a vein, bronchoscopy, & return visits.