Lance Cpl. Chris Brigham, a machine gunner from Machine Gun Platoon, Support Company, Anti-Terrorism Battalion, 4th Marine Division, changes the barrel of a M2 .50 caliber machine gun here July 25 during Exercise Agile Spirit 2011. Agile Spirit is designed to increase interoperability between Marines and the Georgian Armed Forces by exchanging and enhancing each other’s capacity in counterinsurgency and peacekeeping operations, including: small unit tactics, convoy operations, and counter-Improvised Explosive Device training.