EAGAN, Minn. - For a guy who has flown military helicopters in the Middle East, the World War II jeep Joe Repya struggles to fire up is particularly low-tech. "Everything works on this vehicle," he says as the Go Devil four-cylinder engine turns over, sputters, bellows, jumps to life and then dies. Well, almost everything works. Repya, 60, fiddles with the choke and turns the engine over again; this time, it starts for good. A smile sprouts across his face, and now the man who earned a reputation as one of the Army's oldest soldiers in Iraq and one of...