Globemaster Check Air Force Tech. Sgt. Jonathan Carr checks the engines of a C-17 Globemaster III during Exercise Mobility Guardian at Joint Base Lewis-McChord, Wash., Aug. 6, 2017. More than 3,000 airmen, soldiers, sailors, Marines and international partners participated in the exercise. Air Force photo by Tech. Sgt. Nathan Lipscomb SHARE: Download: Full Size (3.08 MB) Credit: Tech. Sgt. Nathan Lipscomb VIRIN: 170806-F-XD880-019Y.JPG Photo Gallery