i bounced around from the detroit lions to the dallas cowboys, but in between detroit and dallas, i started graduate school at the university of virginia in material science engineering. >> but when leland got hurt on the field, it also hurt his chances for a future in pro football. >> so when i got injured again with the cowboys, i just went right back to grad school full time, and then i worked for nasa for ten years doing research, and then i applied to the astronaut corps. while there are many paths to becoming an astronaut, they all have some basic requirements. to apply for the astronaut program you need to have a college degree in engineering, science or math -- and then professional experience, or advanced college degrees. >> three, two, one, zero -- >> so, after you get selected, do you think you head right to space? not so fast -- what are the basic steps in astronaut training? >> the first thing you do is, you go through basic training, which is land survival training, water survival training, then we go through classroom training, systems training for the space station and then