PFC Armando Martinez, left, and PFC Maigyne Edge perform maintenance on a Tractor, rubber tired, Articulated steering, Multi-purpose vehicle (TRAM) aboard Marine Corps Air Station Iwakuni, Japan, Jan. 15, 2014, in preparation to participate in Exercise Cobra Gold. Martinez and Edge are heavy equipment operators with MWSS-171. Exercise Cobra Gold is a multinational joint exercise conducted annually in Thailand and is comprised of forces from participating nations including: Thailand, Singapore, Indonesia, Japan, South Korea, Malaysia and the United States. China will also participate in the exercise as an observing nation. - PFC Armando Martinez, left, and PFC Maigyne Edge perform maintenance on a Tractor, rubber tired, Articulated steering, Multi-purpose vehicle (TRAM) aboard Marine Corps Air Station Iwakuni, Japan, Jan. 15, 2014, in preparation to participate in Exercise Cobra Gold. Martinez and Edge are heavy equipment operators with MWSS-171. Exercise Cobra Gold is a multinational joint exercise conducted annually in Thailand and is comprised of forces from participating nations including: Thailand, Singapore, Indonesia, Japan, South Korea, Malaysia and the United States. China will also participate in the exercise as an observing nation.