Airman 1st Class Kyle Gregory, 28th Civil Engineer Squadron fire protection specialist, completes a stopping exercise during a beginners motorcycle safety course on Ellsworth Air Force Base, S.D., May 3, 2013. During the exercise, designed to test the ability for riders to stop abruptly, cyclists would speed forward then have to stop immediately when signaled to do so by the instructor. (U.S. Air Force photo by Senior Airman Kate Maurer/Released)