Shane D. Ross earned a Ph.D. in control and dynamical systems from the California Institute of Technology in 2004. Since that time he has been an NSF Mathematical Sciences Postdoctoral Fellow@the University of Southern California, and in August he will join the faculty of Virginia Polytechnic Institute and State University in the Department of Engineering Science and Mechanics. Ross's research interests include the study of spacecraft control and mission design, geometrical methods for engineering systems, and mixing and transport processes. Address: Department of Aerospace and Mechanical Engineering, University of Southern California, RRB 217, Los Angeles, CA 90089-1191. Internet: www.shaneross.com