A U.S. Marines with Aircraft Rescue and Fire Fighting (ARFF), Headquarters & Headquarters Squadron, Marine Corps Air Station Beaufort, ignites the F/A-18 simulator during a monthly fuel burn training aboard Marine Corps Air Station Beaufort, S.C., May 16, 2014. ARFF conducts monthly fuel burns to ensure all Marines are competent in their occupational specialty and able to be called upon at a moment's notice. (U.S. Marine Corps photo by Cpl. Aneshea S. Yee/Released)