So we are in a state of rethinking a lot of things, and I think we've made a lot of progress, but we're still in the phase that is—I mean, we're no l… - Bernard Adolph Schriever

You have Stealth technology. That's going to last for a long time, but there will be some breakthroughs on that on the other side from a defense standpoint. What they are, I don't know, but now we're talking about defense against ballistic missiles. We thought at one time that here was a weapon that could never be destroyed by the enemy, but I don't have that same feeling now. I think it can be. But I think you can take actions to counter the defenses that might be set up, too. So it's a game of offense, defense, defense, offense, and so forth, so therefore technology continues as long as we have the world that we're living in.

Perhaps not only initially but for all time, space technology will include as its most characteristic problem the need for going from the surface of one celestial body to another with successful passage through the atmosphere of each.

When I started flying, when I was at Texas A&M [University], we still had horses pulling French 75s around. Now, mind you, this was 1931 when I graduated there. And look where we are today. So it's an awful lot to swallow, and I think we've done extremely well, but we still have a ways to go.