2nd Lt. Raza Alyas, (left) 88th Aerospace Medicine bioenvironmental engineer, and Senior Airman Alex Shuttleworth (right) bioenvironmental engineer, conduct water tests using a M272 Chemical Warfare Agent testing kit, as part of a base exercise scenario revolving around the threat to the base’s critical water and infrastructure, at Wright-Patterson Air Force Base, Ohio, Feb. 2, 2017. The testing kit is used to identify toxic agents such as lewisite, nerve, cyanide, and mustard agents. (U.S. Air Force photo/Michelle Gigante)