SpaceX CEO and Chief Designer Elon Musk pauses during his commencement speech for Caltech graduates in Pasadena, Calif. Friday, June 15, 2012. (AP Photo/Damian Dovarganes)

Associated Press
SpaceX CEO and Chief Designer Elon Musk pauses during his commencement speech for Caltech graduates in Pasadena, Calif. Friday, June 15, 2012. (AP Photo/Damian Dovarganes)
SpaceX CEO and Chief Designer Elon Musk pauses during his commencement speech for Caltech graduates in Pasadena, Calif. Friday, June 15, 2012. (AP Photo/Damian Dovarganes)
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