Air department personnel take chocks and chains off of a U.S. Army CH-47F Chinook helicopter aboard the amphibious transport dock ship USS Green Bay during Exercise Cobra Gold, Feb. 21, 2017. Cobra Gold is the largest theater security cooperation exercise in the Indo-Asia-Pacific region and is an integral part of the U.S. commitment to strengthen engagement in the region. Navy photo by Petty Officer 1st Class Chris Williamson