Soldiers drive a Heavy Expanded Mobility Tactical Truck, or HEMTT, during a run-through of an obstacle on the new Driver's Training Complex at the Grafenwoehr Training Area in Germany. The complex is spread over a 7.6 km area, and consists of a sequence of eleven obstacles designed to train soldiers in a variety of U.S. and multi-national military vehicles, from the HMMWV to U.S. and NATO European model vehicles and tanks. Each of the eleven obstacles replicates the dangers and challenges soldiers, Marines and airmen encounter when driving in diverse battlefield environments. Each of the eleven obstacles replicates the dangers and challenges soldiers, Marines and airmen encounter when driving in diverse battlefield environments.