Airman 1st Class Ariel Clough, 811th Force Support Squadron personnelist, tightens the strings on her Mission-Oriented Protective Posture gear hood during the Ability to Survive and Operate Rodeo held at Joint Base Andrews, Md., Jan. 11, 2018. Clough took part in the MOPP exchange station, which trained Airmen how to change out of contaminated gear and back into clean gear. (U.S. Air Force photo by Airman 1st Class Gabrielle Spalding)