A Marine with Kilo Battery, 1st Battalion, 10th Marine Regiment, 2nd Marine Division runs through a cloud of gas during the unit’s Chemical Biological Radiological and Nuclear training as part of Rolling Thunder aboard Fort Bragg, N.C., Oct. 19, 2014. The training, which was part of a much larger field exercise, prepared the Marines to operate in contaminated environments. (Marine Corps photo by: Cpl. Jorden M. Wells / released)