Chief Steelworker Mike Bonifer, center, and Builder 1st Class Moses Silva, left, assigned to Naval Mobile Construction Battalion 5, work together with the Royal Thai Air Force building posts for the site perimeter of a new school building for the Ban Piang Rat School. NMCB 5 Det Cobra Gold is participating in the project as part of Exercise Cobra Gold 2013. Cobra Gold is an annual Thai-U.S. co-sponsored joint and multinational exercise whose participating nations include: the Kingdom of Thailand, United States, Singapore, Japan, Indonesia, Republic of Korea and Malaysia.