Dr. Bogdan Mihalache, general surgeon, Iași Military Hospital, Romania, and 1st Lt. Roxana Oparlescu, Military Hospital Brașov, participate in a multinational surgical exchange drill at the U.S. Air Force 86th Medical Group Role 2 field hospital during Vigorous Warrior 19, Cincu Military Base, Romania, April 11, 2019. Vigorous Warrior 19 is NATO’s largest-ever military medical exercise, uniting more than 2,500 participants from 39 countries to exercise experimental doctrinal concepts and test their medical assets together in a dynamic, multinational environment (U.S. Air Force photo by 1st Lt. Andrew Layton).