The most obvious way to control the risks associated with current NASA planning is to retain the Space Shuttle capability in some form until there is demonstrated American provided capability to transport humans and cargo to and from the ISS. Retention of the Space Shuttle would provide all of the capability to protect the integrity of the Space Station and its science programs. The issue as always is cost; however, the cost model could be significantly moderated by commercializing the Space Shuttle Program. Estimates are that a commercial venture could operate the Space Shuttle for a couple flights per year at perhaps 1/3 of its current cost. The critical skills are still available at this time. This would enable America to continue the same capability to support the ISS, and even conduct other priority earth orbit missions such as American controlled human access to space to support a critical unforeseen national security need.
By establishing commercialized Space Shuttle operations, NASA can take a known and reliable flight system and use it to develop and transition the governance and oversight processes needed for the COTS era operations. In addition to mitigating the risks and uncertainties associated with current NASA plans, America would retain its prominence as a leading participant in human space flight. A professionally done peer reviewed risk assessment will define the risks with their associated uncertainties and highlight where mitigations must be taken. To do otherwise places reliance on hope over experience.
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