Army Chief Warrant Officer Natalie Miller and her crewmates prepare to leave for a weeklong training mission focused on high-altitude flight operations aboard a CH-47F Chinook heavy-lift cargo helicopter, Greenville, S.C., Feb. 24, 2017. Miller is assigned to the South Carolina National Guard’s 2nd General Support Aviation Battalion, 238th Aviation Regiment. South Carolina Army National Guard photo by Staff Sgt. Roberto Di Giovine