Big Bang An M777 towed 155 mm howitzer fires as U.S. soldiers conduct training in Phitsanulok, Thailand, Feb. 20, 2019, as part of Cobra Gold, an annual multinational exercise in the Indo-Pacific. SHARE: Download: Full Size (1.79 MB) Tags: howitzer, Cobra Gold, Army Credit: Marine Corps Cpl. Robert Gavaldon VIRIN: 190220-M-PG096-1026Y.JPG Photo Gallery