PHOTO: John Glenn posed for a portrait shortly after doing live television interviews on the 50th anniversary of his historic flight as the first American to orbit Earth, Feb, 20, 2012, in Columbus, Ohio.
Bill Ingalls/NASA via Getty Images
<a href="http://www.sodahead.com/fun/plans-for-the-hyperloop-a-high-speed-transit-system-linking-los-angeles-and-san-francisco-have-bee/question-3864783/" title="Plans for the Hyperloop, a high-speed transit system linking Los Angeles and San Francisco, have been released. Would you use such a system to get from one town to another?">Plans for the Hyperloop, a high-speed transit system linking Los Angeles and San Francisco, have been released. Would you use such a system to get from one town to another?</a>
 
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