Airmen from the 86th Medical Group, Ramstein Air Base, Germany, participate in a multinational medical evacuation exercise drill with a Polish Mi-17 helicopter during exercise Vigorous Warrior 19, Cincu Military Base, Romania, April 9, 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)