IMAGE DISTRIBUTED FOR SHELL - General View of the Opening Ceremony of the Shell Eco-marathon Challenge Europe at The Ahoy centre in Rotterdam, The Netherlands on Friday, May 17, 2013. Teams from ... more 
IMAGE DISTRIBUTED FOR SHELL - General View of the Opening Ceremony of the Shell Eco-marathon Challenge Europe at The Ahoy centre in Rotterdam, The Netherlands on Friday, May 17, 2013. Teams from universities all over Europe have brought their energy efficient cars to compete through the three-day challenge. (Ermindo Armino/AP Images for Shell) less 
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Associated Press
Fri, May 17, 2013 12:23 PM EDT