Aug 22 2025

250821-F-HW521-1676

Airman 1st Class Aden Brown

U.S. Air Force Airmen participating in a chemical, biological, radiological and nuclear defense course prepare to take off their gas masks inside of a gas chamber on Joint Base Pearl Harbor-Hickam, Hawaii, August 21, 2025. The primary objective of CBRN training is to protect Airmen from the effects of biological and chemical weapons, radioactive substances and nuclear incidents. (U.S. Air Force photo by Airman 1st Class Aden Brown)

Aug 21 2025

647 CES holds chemical, biological, radiological and nuclear defense refresher course

Airman 1st Class Aden Brown

U.S. Air Force Airmen step outside of a gas chamber on Joint Base Pearl Harbor-Hickam, Hawaii, August 21, 2025. Participants verified their gas mask seal inside the gas chamber, then removed it to test their resilience in a contaminated environment. (U.S. Air Force photo by Airman 1st Class Aden Brown)

Aug 21 2025

647 CES holds chemical, biological, radiological and nuclear defense refresher course

Airman 1st Class Aden Brown

A U.S. Air Force Airman checks the seal of his gas mask inside of a gas chamber on Joint Base Pearl Harbor-Hickam, Hawaii, August 21, 2025. The primary objective of a chemical, biological, radiological and nuclear defense course training is to protect Airmen from the effects of biological and chemical weapons, radioactive substances and nuclear incidents. (U.S. Air Force photo by Airman 1st Class Aden Brown)

Aug 21 2025

647 CES holds chemical, biological, radiological and nuclear defense refresher course

Airman 1st Class Aden Brown

U.S. Air Force Airmen participating in a chemical, biological, radiological and nuclear defense course prepare to take off their gas masks inside of a gas chamber on Joint Base Pearl Harbor-Hickam, Hawaii, August 21, 2025. The primary objective of CBRN training is to protect Airmen from the effects of biological and chemical weapons, radioactive substances and nuclear incidents. (U.S. Air Force photo by Airman 1st Class Aden Brown)

Aug 21 2025

647 CES holds chemical, biological, radiological and nuclear defense refresher course

Airman 1st Class Aden Brown

A U.S. Air Force Airman participating in a chemical, biological, radiological and nuclear defense course prepares to take off his gas mask inside of a gas chamber on Joint Base Pearl Harbor-Hickam, Hawaii, August 21, 2025. The primary objective of CBRN training is to protect Airmen from the effects of biological and chemical weapons, radioactive substances and nuclear incidents. (U.S. Air Force photo by Airman 1st Class Aden Brown)

Aug 21 2025

647 CES holds chemical, biological, radiological and nuclear defense refresher course

Airman 1st Class Aden Brown

U.S. Air Force Airman 1st Class William Dobyns, 647 Civil Engineer Squadron emergency management journeyman, assists an Airmen donning their mission oriented protective posture gear during a chemical, biological, radiological and nuclear defense course on Joint Base Pearl Harbor-Hickam, Hawaii, August 21, 2025. In emergency management, CBRN specialists perform response operations, warning and reporting to support critical missions, ensuring the safety and security of personnel and equipment. (U.S. Air Force photo by Airman 1st Class Aden Brown)