U.S. Service members set up a hazardous material decontamination station during a training course at Langley Air Force Base, Va., Aug. 13, 2014. The Hazardous Materials Awareness and Operations course included classroom briefings on potential hazards certain chemicals possess, evacuation processes and emergency response procedures and ended with a simulated HAZMAT emergency exercise. (U.S. Air Force photo by Senior Airman Connor Estes/Released)