A soldier uses a sledge hammer to break down a door to gain entry to a building after breaching an enemy compound during rotation 14-10 at the National Training Center on Fort Irwin, Calif., Sept. 18, 2014. A soldier uses a sledge hammer to break down a door to gain entry to a building after breaching an enemy compound during rotation 14-10 at the National Training Center on Fort Irwin, Calif., Sept. 18, 2014. SHARE: Download: Full Size (1.96 MB) Tags: Photo Essays Credit: VIRIN: 492939-F-LSB67-483.jpg Photo Gallery