U.S. Army personnel prepare a U.S. Army UH-60 Black Hawk helicopter prior to departure from the flight line, Kotzebue, Alaska, and travel to outlying villages, in support of Innovative Readiness Training Arctic Care, April 14, 2018. Service members in support of IRT Arctic Care will conduct critical mission training and logistical movements in order to simulate military/civilian humanitarian operations and health care delivery in time of crisis, conflict or disaster. (U.S. Marine Corps photo by Lance Cpl. Ricardo Davila)