University of Akron students Nick Davis (left) and Tony Guld work inside their vehicle before the start of the Challenge X competition in Englishtown, New Jersey, Thursday, May 15, 2008. The four-year Challenge X competition series challenges teams of students from 17 top North American universities to re-engineer a stock Chevrolet Equinox to achieve better fuel economy and lower greenhouse gas emissions - without sacrificing its performance, utility and safety. (Photo by Emile Wamsteker for General Motors) (United ... -- Download (2500 KB)