THANKING SOLDIERS U.S. soldiers listen to U.S. Defense Secretary Leon E. Panetta on Forward Operation Base Sharana, Afghanistan, Dec. 14, 2011. Panetta thanked the soldiers, assigned to the 172nd Infantry Brigade, for their service. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 711210-Z-MAL86-651.jpg Photo Gallery