U.S. Coast Guard Petty Officer 3rd Class Klynt Raymond, a machinery technician attached to the USCGC Mohawk (WMEC 913), conducts a fit test for the M50 respirator gas mask while underway in the Atlantic Ocean, June 21, 2022. The M50 masks are used to protect against chemical or biological agents as well as toxins or radioactive particulate matter that could affect your breathing. (U.S. Coast Guard photo by Petty Officer 3rd Class Jessica Fontenette)