A U.S. Army CH-47 Chinook is used to transport Soldiers during a combined arms live fire exercise at Ban Chan Khrem, Thailand, during exercise Cobra Gold, Feb. 19, 2016. Cobra Gold is a multinational training exercise developed to strengthen security and interoperability between the Kingdom of Thailand, the U.S. and other participating nations. - A U.S. Army CH-47 Chinook is used to transport Soldiers during a combined arms live fire exercise at Ban Chan Khrem, Thailand, during exercise Cobra Gold, Feb. 19, 2016. Cobra Gold is a multinational training exercise developed to strengthen security and interoperability between the Kingdom of Thailand, the U.S. and other participating nations.