Alaska Air National Guard Capt. Roger Tran, the Nuclear Medical Science Officer for the 103rd Civil Support team, leads the unit in assessing biological hazards at a validation exercise in Anchorage, Aug. 4, 2020. Tran assisted the Alaska State Public Health laboratory during the COVID-19 pandemic. from early June to mid August (U.S. Army National Guard photo by Sgt. Seth LaCount/Released)