Elon Musk, co-founder and chief executive officer of Tesla Motors Inc. and Space Exploration Technologies Corp. (SpaceX), center, prepares to testify at a Senate Appropriations subcommittee hearing in Washington, D.C., U.S., on Wednesday, March 5, 2014. Musk says competition in the U.S. military’s satellite-launch program may save taxpayers more than $1 billion a year. Photographer: Pete Marovich/Bloomberg via Getty Images