Astronaut Sally Ride speaks to a group of female students Sept. 15 at the College of engineering campus as part of a national seris of Sally Ride Science Festivals. Rid, the first American woman in space, encouraged the girls to get involved in math and science. Veridian, a national security and information technology firm that has offices in Ann Arbor, sponsored the event.(Photo by Marcia Ledford, U-M Photo Services)