William F. Bottke is the director of the Department for Space Studies at the Southwest Research Institute (SwRI) in Boulder, Colorado. He also is currently the director of the Institute for the Science of Exploration Targets (ISET) of NASA’s SSERVI program, and is in charge of the Dynamical Evolution Working Group for NASA’s OSIRIS-REx asteroid sample return mission. He is the author of more than 150 refereed articles.