I grew up in the 1960s and wanted to become part of the great space exploration effort, but when I graduated from college in 1974 the Apollo program was over and the country had moved into this pessimistic mode. We had entered the "age of limits." For awhile I accepted that and went off from my chosen path and became a high school science teacher. And that's a very noble profession, but it wasn't my dream. Then at a certain point I said to myself, "This is not what I wanted to be doing when I was growing up." So I went back to graduate school, got myself some engineering degrees and got a job at Martin Marietta -- which then became Lockheed Martin -- doing preliminary design of interplanetary missions. And I've been able to participate in the space program. It has been an enormous adventure, and who knows -- I may succeed in making this happen. But if not, I've lived a life I've always dreamed of living. So what I say is, if you want to be a space explorer, then do what is necessary to be a space explorer. Push yourself to get the qualifications and get involved, whether on the industry side, or the NASA side, or the university side.