B-roll of U.S. Soldiers, assigned to the 317th Brigade Engineer Battalion, 3rd Brigade Combat Team, 10th Mountain Division (Light Infantry), conducting chemical, biological, radiological, and nuclear (CBRN) detection in a joint training exercises with Bulgarian Armed Forces CBRN specialists at Novo Selo Training Area, Bulgaria, Oct. 2, 2024. CBRN specialists routinely train to ensure they are prepared to operate in hazardous conditions. (U.S. Army video by Spc. Joshua Maxie)