Bob Crippen: Proud the commander & pilot of STS-1 & commander & pilot of #STS135, the 1st & last shuttles, were Navy! #NASATweetup. #STS135
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Bob Crippen: Proud the commander & pilot of STS-1 & commander & pilot of #STS135, the 1st & last shuttles, were Navy! #NASATweetup. #STS135