Airman 1st Class Dakota Parker, left, of Brownsboro, Texas, and Senior Airmen Brittany Sculley, of Blair, Neb., both assigned to Misawa Air Base, Bioenvironmental Engineering Department, recalibrate a radiation detection instrument following an air sample test at Misawa Air Base. The department's field team is conducting frequent tests of atmospheric radiation levels and water contamination to ensure the safety of service and family members as efforts continue on base in support of Operation Tomodachi.