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

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)

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

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)

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

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)

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

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)

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

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)

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

U.S. Air Force Staff Sgt. Alyssa Lopez, 647th Civil Engineer Squadron training and logistics non-commissioned officer in charge, assists an Airmen dismantling his gas mask 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)

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

U.S. Air Force Airman 1st Class William Dobyns, 647th Civil Engineer Squadron emergency management journeyman, teaches Airmen how to dismantle their assigned gas masks 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)

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

Published Aug. 21, 2025

JOINT BASE PEARL HARBOR-HICKAM, Hawaii --

Team Hickam Airmen participating in a chemical, biological, radiological and nuclear defense refresher course 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.