Robert Carman poses for a photo with his bike at Joint Base Charleston, S.C., April 2, 2012. The Green Knights Military Motorcycle Club is a non-profit organization for military and Department of Defense motorcyclists and has more than 100 chapters all over the world. Carman is a retired U.S. Air Force master sergeant and is the Green Knights Motorcycle Club vice president. (U.S. Air Force photo/Airman 1st Class George Goslin)