Peggy Whitson, an Iowa native, spent more time in space than any other U.S. astronaut. On Earth, Idaho native Lisa Davis oversees U.S. operations of Siemens, a powerful German-based conglomerate. Mississippi native Oprah Winfrey grew up to become one of the most powerful and influential women in the world. They join TV host Katie Couric of Virginia in a new report that lists the most inspirational women in the world. Couric, a University of Virginia graduate, began her career in journalism as an assistant at the ABC network.