U.S. Marines perform counterinsurgency training exercises. U.S. Marines from Battalion Landing Team 1st Battalion, 9th Marine Regiment, 24th Marine Expeditionary Unit perform counterinsurgency training exercises at the Muscatatuck Urban Training Center in Indiana during a 24th Marine Expeditionary Unit realistic urban training exercise on Sept. 27, 2009. Realistic urban training is a pre-deployment training exercise. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 083260-C-UUK49-184.jpg Photo Gallery