AutoTrader.com regularly hires dvDepot to photograph car shows around the country. Megan Green, an excellent photographer, has been handling this job since 2005. We just received her photos from the North American International Auto Show in Detroit, one of the biggest car shows in the world.The Audi e-tron is a battery powered sports car. It is a leap forward in battery powered cars, with a top speed of 124 mph. Each wheel has its own electric hub motor to increase speed. The battery gives the car a range of 155 miles. A new heat pump system surrounds the lithium-ion battery, keeping its temperature steady even in hot and cold weather, which was previously a major barrier in electric cars. The 2011 Ford Mustang features a return to its roots. Since 2001, the Mustang has been made with 4.6 liter engine that some purists felt lacked the power of the previous models. At NAIAS, Ford unveiled the comeback of the 5.0 engine. With 412 HP this is a return of the power Mustang. The 2011 Mustang will be available in the Spring. The GMC Granite was presented as a concept car. Recent government mandates require that car companies must increase their average fuel efficiency. GMCâ€™s line is almost entirely gas guzzling pickups. If produced, the Granite would be GMCâ€™s smallest car and is designed to be so fuel efficient that it would drastically increase GMC overall average. Dubbed an â€œurban utility vehicle,â€ GMC hopes it will appeal to young, hip city dwellers.