Senior Airman Tracy Collins and Tech. Sgt. Dac Chaplin from the 178th Wing Medical Group compare water samples from the Pohakuloa Training Area, Hawaii in an effort to help investigate health concerns, June 15. The Airmen are part of a 33-person team comprised of the 178th Medical Group and 121st Medical Group participating in joint medical training with the Army while completing their annual training requirements. (U.S. Air National Guard photo by 2d Lt. Lou Burton)