U.S. Army soldiers fire a 60 mm mortar round during Cobra Gold. U.S. Army soldiers fire a 60 mm mortar round during Cobra Gold on Pulon Range, Thailand, on Feb. 11, 2011. Cobra Gold is a joint forces, multinational exercise designed to ensure regional peace and stability. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 571737-Y-JWT85-586.jpg Photo Gallery