The Progressive Automotive X-Prize, closing in on its May 2010 competition start date, held a technical summit of the participating 43 teams at the 2009 SEMA show in Las Vegas. Twelve of those teams brought along vehicles to display at the show, each one in varying degrees of completeness.

This post is an excerpt of an article from Popular Mechanics. You can read the full post on their website. Written by Ben Stewart.

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