Airman 1st Class Mathew Kindoll and Staff Sgt. Christopher McFefries take a challenge in Level A suits during the 2009 Chemical, Biological, Radiological, and Nuclear Challenge June 22 at Ramstein Air Base, Germany. The CBRN Challenge consisted of six teams going head to head in six different scenarios. Airman Kindoll is assigned to the 48th Civil Engineer Squadron, and Sergeant McFefries is assigned to the 100th Civil Engineer Squadron. (U.S. Air Force photo/Staff Sgt. Stephen J. Otero)
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