U.S. Air Force airmen prepare to take-off on a C-17 Globemaster III cargo aircraft at Ali Air Base, Iraq. U.S. Air Force airmen prepare to take-off on a C-17 Globemaster III cargo aircraft at Ali Air Base, Iraq, signaling the end of Operation New Dawn on Dec. 18, 2011. The airmen were part of the last troops to leave Iraq. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 483070-E-OKM73-938.jpg Photo Gallery