An OH-58 Kiowa helicopter fires its .50 caliber machine gun during a strafing run on a mock enemy compound during a live-fire exercise at the Joint Readiness Training Center on Fort Polk, La., Jan. 14, 2012. An OH-58 Kiowa helicopter fires its .50 caliber machine gun during a strafing run on a mock enemy compound during a live-fire exercise at the Joint Readiness Training Center on Fort Polk, La., Jan. 14, 2012. SHARE IMAGE: Download Image: Full Size (1.81 MB) Tags: Photo Essays Photo By: VIRIN: 007505-N-QBR34-414.jpg Photo Gallery