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Instead of prolonging the inevitable, just close it down. When the Shuttle program shuts down, it will be the end of US hosted manned spaceflight for half a century or more. And a few years later the ISS will go out of service having accomplished little except for prolonging its own life. The Chinese and Indians will have some national pride projects in the pipeline. The Russians will keep their heavy lifters to LEO operational if only to generate revenue. But beyond that manned spaceflight is pretty much done. Given that, NASA could shrink massively to host only satellite programs. "Wasteful" programs like NASA go against Progressive dogma anyway.