Automotive X Prize: Some teams fail to finish the final race

Two favored, well-known electric car teams--Aptera and ZAP--competing in the Automotive X Prize failed to finish the final race of the competition, dashing their chances of winning the $2.5 million prize for the side-by-side alternative-class cars.

In the final race, contestants had to complete 50 laps of Michigan International Speedway (MIS), for a total of 100 miles. The car that finished fastest without running out of batteries would win.