Airmen from the 940th Civil Engineer Squadron and 9th CES scan the area for nuclear radiation during a Total Force Integration exercise, May 13, near the CE compound at Beale Air Force Base, Calif. The training exercise helped prepare both reserve and active duty airmen for any contingency involving radioactive explosive devices. (U.S. Air Force Photo/ Tech. Sgt. Luke Johnson)

Air Force Reservist Tech. Sgt. Stephanie Chan, 940th Civil Engineer Squadron, assists an airman with donning his personal protective gear during a collaborative CE training exercise involving airmen from the 940th CES and the 9th CES, May 14. The exercise provided an excellent opportunity for reserve and active duty units to train together to become more proficient in handling an urgent situation involving a radioactive explosive device. (U.S. Air Force Photo/ Tech. Sgt. Luke Johnson)

Air Force Reservist Master Sgt. Christopher Reitz, 940th Civil Engineer Squadron, provides a safety briefing to Airmen during a training exercise at the Beale Air Force Base CE compound, May 14. The exercise helped reserve and active duty units better prepare for any emergency involving a nuclear, biological or industrial disaster. (U.S. Air Force Photo/ Tech. Sgt. Luke Johnson)

Air Force Reservist Tech. Sgt. Stephanie Chan, 940th Civil Engineer Squadron, scans a suspicious object with a Geiger counter during a Total Force Integration training exercise near the Beale Air Force Base CE compound, May 14. The exercise helped prepare both reserve and active duty airmen for any contingency involving radioactive explosive devices. (U.S. Air Force Photo/ Tech. Sgt. Luke Johnson)