U.S. Army Sgt. Ryan Walsh, left, and Sgt. Wesley Smith,

U.S. Army Sgt. Ryan Walsh, left, and Sgt. Wesley Smith, infantrymen, 5th Battalion-20th Infantry Regiment, 1st Stryker Brigade Combat Team, 2nd Infantry Division demonstrate hall clearing techniques for U.S. and Royal Thai Army soldiers during conduct military operations in urban terrain (MOUT) training at Cobra Gold 2019, Feb. 13, 2019, Phitsanulok, Kingdom of Thailand. Exercise Cobra Gold is the largest Theater Security Cooperation Exercise in the Indo-Pacific and is an integral part of the U.S. commitment to strengthen engagement in the region. (U.S. Army photo by Sgt. Alvin Reeves - Cobra Gold 19)