IRAQI BORDER The last U.S.military forces drive across the Iraqi border Dec. 18, 2011, following the Iraqi and U.S. security agreement requiring all U.S. service members to depart the country by Dec. 31, 2011. Since 2003, more than 1 million airmen, soldiers, sailors and Marines have served in Iraq. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 185107-V-AQR32-578.jpg Photo Gallery