U.S. Marine Corps Cpl. Aaron Brown, left, a chemical,

U.S. Marine Corps Cpl. Aaron Brown, left, a chemical, biological, radiological and nuclear (CBRN) defense specialist with Marine Aircraft Group (MAG) 12, and Sgt. Breanna Reiser, an explosive ordnance disposal (EOD) technician with Marine Wing Support Squadron (MWSS) 171, conduct chemical response training at Marine Corps Air Station Iwakuni, Japan, Oct. 29, 2019. CBRN and EOD Marines trained together to maintain proficiency in chemical response operations. (U.S. Marine Corps photo by Cpl. Seth Rosenberg)