Senior Airman Guy Self, 51st Aircraft Maintenance Squadron, 36th Aircraft Maintenance Unit weapons load crew member, assists Staff Sgt. Joshua Groom, 51st AMXS, 36th AMU weapons load crew team chief, with his gas mask during a quarterly load crew competition at Osan Air Base, Republic of Korea, Oct. 17, 2014. Using the buddy system while putting on chemical warfare gear helps to ensure everything is put on properly. (U.S. Air Force photo by Senior Airman Matthew Lancaster)