250821-Z-TY602-1342
A U.S. Marine chemical, biological, radiological, and nuclear (CBRN) defense specialist with 174th Marine Wing Support Squadron clears a building with an M-16 A4 Service Rifle during exercise Toxic Swell 25 at Marine Corps Training Area Bellows, Hawaii, Aug. 21, 2025. Airmen, Marines and partnered nations completed exercise Toxic Swell 25 as a joint chemical, biological, radiological, and nuclear [CBRN] response hosted by the 174 Marine Wing Support Squadron.