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You formed study committees, and committees to study those committees, and that was all you did. From the 1950s through the 1990s, my father invested his money in computer stocks.

I was already very wealthy, and I was frustrated enough to risk it all.

We would be mining fifteen miles down, or at the ocean bottom.

I decided it was more logical to mine five thousand miles up. Government first with my proposal for asteroid capture and mining.

None of these things just by chance; they are designed into the system as it grows. From the invited address of Salter Wherry to the United Nations General Assembly, following establishment of Salter Station in a stable six-hour orbit around the Earth, and shortly before Wherry withdrew from contact with the general public: Nature abhors a vacuum.

The 747 could not exist until most of the support technology has already developed. All of it was oriented to fit the needs of the passenger as our culture has determined them. (In fact, I'm told it's the state bird of Hawaii.) It is an active vital symbol of our national technology, but it is no more independent of that technology than is a bird independent of the air in which it flies. If there is an open ecological niche, some organism will move to fill it. Twenty years ago there was a clear emerging crisis in mineral resource supply.

They were words that had become permanently linked to his name, and they had earned him the impotent enmity of every nation on earth: "The conquest of space is too important an enterprise to be entrusted to governments."For most missions, almost half of the delta-V budget is used up in the first 160 kilometers or so, the lift-off from Terra's surface into Low Earth Orbit.

I also invite people from all nations on Earth to join me in those facilities.If you try to go on a trip in your automobile, you are not going to get very far if there are no gasoline stations to feed your auto. The owners of the infrastructure will probably adjust the fees so it will be cheaper to use their services, but only barely. Does one privately owned corporation have a monopoly? Imagine for a moment, a fully loaded 747 jet airliner flying from Los Angeles to New York. Having said that, creating these pieces of infrastructure will be very expensive. And you can be sure that whoever manages to build them will have iron control over who is allowed to use said infrastructure. It is possible to use spacecraft without any of this infrastructure, but it will be much more difficult. A starship is not an independent entity—no more than a jet plane is independent just because it can leave the ground.With such flimsy construction it does not take much normal wear-and-tear to turn the spacecraft into junk.Having a propellant depot at the mid-point of a round-trip mission cuts the required delta-V in half.

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