ABSTRACT
Upon discovery that you are in a chemical, biological, radiological, and nuclear (CBRN) environment, you are ordered or conditions exist that you determine you need to mask.
Don your protective mask, clear and check seal of the mask.
Upon discovery that you are in a chemical, biological, radiological, and nuclear (CBRN) environment, you are ordered or conditions exist that you determine you need to mask.
Don your protective mask, clear and check seal of the mask.