Sally Ride was the first American woman in space. These days she's on a mission to encourage girls to develop better skills in science, math and technology. Her company, Imaginary Lines, runs a science club, science festivals and space camps, all for girls. Jon Gordon reports on "Future Tense." [Correction: Valentina Tereshkova from the former Soviet Union journeyed into space 20 years earlier than Ride. Audio states that Sally Ride was the first woman in space; Ride was the first American woman in space.]