U.S. Air Force Senior Airman Ronell Tennant, 633rd Civil Engineer Squadron emergency management technician, suits up before going inside a contaminated building during a training exercise at Langley Air Force Base, Va., May 16, 2013. During the exercise and in real-life scenarios, a bioenvironmental technician aids the emergency management technician in gathering important data from the incident site. (U.S. Air Force photo by Airman 1st Class Austin Harvill/Released)