[RenewableEnergyAccess.com] Only 11 minutes separate the top two cars in the North American Solar Challenge (NASC) – the 2,500-mile cross-country solar car challenge that began in Austin, Texas on July 17 and ends on July 27 in Calgary, Alberta, – on the ninth day of competition. Twelve teams reached the final stage stop in Medicine Hat, Alberta, where the University of Michigan took the overall race lead with the lowest cumulative time of 50 hours, 32 minutes and five seconds. Michigan is followed closely by the University of Minnesota at 50:43:54 and the Massachusetts Institute of Technology at 50:43:54. Other teams to make it to Medicine Hat, 2,306 miles from the starting point in Austin, Texas, are the University of Missouri-Rolla, University of Waterloo, Western Michigan University, Principia, University of Missouri-Columbia, CalSol, Stanford University, Iowa State University and the University of Calgary. The NASC has two classes competing; the open class where teams are allowed to use batteries or solar cells of their choice and the stock class where teams use only lead acid batteries and solar cells approved by NASC officials.