Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

Luis Melendez Gonzalez, 51st Civil Engineer Squadron emergency management logistics, stands behind a gas hazard cordon during a chemical, biological, radiological and nuclear exercise at Osan Air Base, Republic of Korea, Oct. 30, 2025. During the exercise, chemical detection and rapid cordoning were critical to isolating hazards, protecting the base and preventing contamination from spreading. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

A 51st Civil Engineer Squadron uses a chemical detector during a chemical, biological, radiological and nuclear exercise at Osan Air Base, Republic of Korea, Oct. 30, 2025. Members practiced site surveys, sampling and unexploded ordnance protocols to enhance readiness for future contingencies. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

Members of 51st Civil Engineer Squadron and Republic of Korea Air Force inspect M8 chemical detection paper during a chemical, biological, radiological and nuclear response exercise at Osan Air Base, ROK, Oct. 30, 2025. Through realistic scenarios, service members identified operational gaps and developed new solutions to strengthen CBRN readiness. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

Members of the Republic of Korea Air Force don chemical, biological, radiological, and nuclear gear during a CBRN response exercise at Osan Air Base, ROK, Oct. 30, 2025. The bilateral training emphasized equipment interoperability, mask-on response times and decontamination procedures. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

Members of the 51st Civil Engineer Squadron and Republic of Korea Air Force pose for a photo after a chemical, biological, radiological and nuclear exercise at Osan Air Base, ROK, Oct. 30, 2025. The exercise strengthened the U.S.-ROK alliance ensuring Airmen could respond quickly to CBRN threats, protect the base and restore mission capability. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

U.S. Air Force Senior Airman Madisyn Collier, 51st Civil Engineer Squadron emergency management technician, processes through the decontamination line during a chemical, biological, radiological and nuclear exercise at Osan Air Base, Republic of Korea, Oct. 30, 2025. The bilateral CBRN training emphasized equipment interoperability, mask-on response times and decontamination procedures. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

A Republic of Korea Air Force member decontaminates U.S. Air Force Senior Airman Madisyn Collier, 51st Civil Engineer Squadron emergency management technician, during a chemical, biological, radiological and nuclear exercise at Osan Air Base, ROK, Oct. 30, 2025. The bilateral CBRN training emphasized equipment interoperability, mask-on response times and decontamination procedures. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

Republic of Korea Air Force members set up a decontamination shower during a chemical, biological, radiological, and nuclear exercise at Osan Air Base, ROK, Oct. 30, 2025. Through realistic scenarios, participants identified operational gaps and developed new solutions to strengthen CBRN readiness. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

U.S. Air Force Senior Airman Madisyn Collier, 51st Civil Engineer Squadron emergency management technician, stands up a cordon during a chemical, biological, radiological and nuclear exercise at Osan Air Base, Republic of Korea, Oct. 30, 2025. Members practiced site surveys, sampling and unexploded ordnance protocols to enhance readiness for future contingencies. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

Members of 51st Civil Engineer Squadron and Republic of Korea Air Force collect chemical samples during a chemical, biological, radiological and nuclear exercise at Osan Air Base, ROK, Oct. 30, 2025. The exercise strengthened the U.S.-ROK alliance ensuring Airmen could respond quickly to CBRN threats, protect the base and restore mission capability. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

A 51st Civil Engineer Squadron Airman uses a spectrometer to analyze a simulated chemical sample during a chemical, biological, radiological and nuclear exercise at Osan Air Base, Republic of Korea, Oct. 30, 2025. Members practiced site surveys, sampling and unexploded ordnance protocols to enhance readiness for future contingencies. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

A 51st Civil Engineer Squadron Airman takes a photo during a chemical, biological, radiological and nuclear exercise at Osan Air Base, Republic of Korea, Oct. 30, 2025. Members practiced site surveys, sampling and unexploded ordnance protocols to enhance readiness for future contingencies. (U.S. Air Force photo by Staff Sgt. Sarah Williams)

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Detect, Protect, Respond: U.S.-ROK train for CBRN readiness

Published Oct. 29, 2025
By Staff Sgt. Sarah Williams
51st Fighter Wing Public Affair

OSAN AIR BASE, Republic of Korea --

The 51st Civil Engineer Squadron conducted a joint chemical, biological, radiological and nuclear response exercise at Osan Air Base, Republic of Korea, Oct. 30, 2025. The bilateral training strengthened the U.S.-ROK alliance by improving interoperability, decontamination procedures, and the ability to respond rapidly to CBRN threats.