Afghan national army Maj. Gen. Mohammad Yaftali, right, shows U.S. Army Lt. Gen. Joseph Anderson a unit challenge coin on Forward Operating Base Thunder in Afghanistan's Paktia province, March 5, 2014. Anderson is commander of the 18th Airborne Corps, and Yaftali is commanding general of the 203rd Corps. Afghan national army Maj. Gen. Mohammad Yaftali, right, shows U.S. Army Lt. Gen. Joseph Anderson a unit challenge coin on Forward Operating Base Thunder in Afghanistan's Paktia province, March 5, 2014. Anderson is commander of the 18th Airborne Corps, and Yaftali is commanding general of the 203rd Corps. SHARE: Download: Full Size (2.05 MB) Tags: Photo Essays Credit: VIRIN: 865441-T-USO62-112.jpg Photo Gallery