Airman 1st Class Nicholas Horton, 316th Civil Engineer Squadron firefighter, stretches out a hose line to be use to decontaminate bioenvironmental engineer workers during a hazardous material exercise Feb. 1 , 2010, at Joint Base Andrews, Md. The exercise helped Airmen stay proficient in HAZMAT procedures and decontamination. (U.S. Air Force photo by Airman 1st Class Perry Aston)