Senior Airman Trevor Read, 436th Bioenvironmental Engineers Squadron technician, demonstrates scanning a package for radiation with the SAM 935 while wearing a Level-A suit at the Bioenvironmental Engineers shop, Feb. 18 2011, on Dover Air Force Base, Del. The precautions taken in the demonstration simulated the conditions of a real-world radiation threat on base. (U.S. Air Force photos/Airman 1st Class Samuel Taylor)