Col. Pyo In Tae (left), Chief, Program Management Team, ROK Design and Construction Agent, and Col. Garrett Cottrell (right), Deputy Commanding Officer - Transformation, U.S. Army Corps of Engineers Far East District, sign the Acceptance Release Letter for C4I090, which will support security operations for the Battle Command Training Center at USAG Humphreys, Republic of Korea, Nov. 5. This event signifies a major project milestone for C4I090 and demonstrates the strength of the US-ROK alliance.