RecruitingClinical trialEvaluation of Multi-Cancer Early Detection Testing in a High-Risk Military Population: The Sentinel StudyThe purpose of this research study is to evaluate the possible benefits of an investigational, but commercially available Galleri multi-cancer early detection (MCED) blood test which is designed to detect many types of cancer early in veterans who have served in the military in active duty. The name of the screening blood test being studied is: -GRAIL Galleri MCED test