SNOW WORKERS U.S. Air Force maintainers prepare to install an auxiliary power unit for a C-17 Globemaster III aircraft on McChord Air Force Base, Wash., Dec. 17, 2008. The airmen are assigned to the 62nd Aircraft Maintenance Squadron. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 601800-Z-ZJV26-469.jpg Photo Gallery