From left, U.S. Air Force Airman 1st Class Cassie Waldrop and Tech. Sgt. Nikia Freeman, 908th Civil Engineering Squadron bioenvironmental engineers, collect and test samples Jan. 10, 2020, at the 908th Airlift Wing Fire Department, Maxwell AFB, Ala. Once the tests reveal the substances in question, the Airmen follow emergency handling procedures relevant to the specific substance. (U.S. Air Force photo by Senior Airman Shelby Thurman)