thus ends the US era of large scale solid rocket engines that destroy ozone. Not a lot because we only launched a few shuttles per year, but enough to teach us in the future the US should not be using large scale boost motor that burn through the stratosphere. All plans seem to suggest NASA won't :)
The shuttle represents ~ 12 % of the United States space mission a year. Why more people don't know this is beyond me. We have what 8 spacecraft in orbit around objects in the solar system. The future of the US space program is fine so long as Congress doesn't * it up. This congress can * anything up :(
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