As seen through a night-vision device, a U.S. Air Force tactical air controller pulls security alongside Army soldiers during Operation Champion Sword, an air assault mission mission, in Khost province, Afghanistan, Aug. 4, 2009. As seen through a night-vision device, a U.S. Air Force tactical air controller pulls security alongside Army soldiers during Operation Champion Sword, an air assault mission mission, in Khost province, Afghanistan, Aug. 4, 2009. SHARE: Download: Full Size (2.49 MB) Tags: photo essays Credit: VIRIN: 262071-T-HYO71-820.jpg Photo Gallery