What's next for NASA's space program? A former astronaut looks at the possibilities

The Atlantis mission will close the books on NASA's space shuttle program. Where does space exploration go from here? This morning, CNN's Ali Velshi takes an in-depth look at the future of space travel with Jim Halsell, a former astronaut who has flown five shuttle missions – two as a commander, three as a pilot. … Continue reading What's next for NASA's space program? A former astronaut looks at the possibilities