Senior Airman Benjamin Suiso, aerospace medical technician with the 154th Medical Group assists fellow aerospace medical technician Senior Airman Andrew Tolentino with the donning of his protective mask during a Collective Training Exercise held at Kalaeloa, Hawaii, Jan. 18, 2019. The exercise allowed the airmen to hone skills and run through the procedures that would be employed during response to a domestic chemical, biological, radiological, nuclear, or explosive event. (U.S. Air National Guard photo by Senior Airman Orlando Corpuz)