A soldier with the 23rd Singapore Infantry Brigade familiarizes U.S. Army Soldiers of the Hawaii Army National Guard with the Singapore Assault Rifle 21 during exercise Tiger Balm 13 at Camp Pasir Laba, Singapore, July 15, 2013. Tiger Balm is a bilateral exercise between U.S. Army Pacific and the Singapore Armed Forces designed to enhance interoperability between the two nations. (U.S. Army National Guard photo by Spc. Tyler Meister/Released)