Germany's Nurburgring race track, nicknamed "the Green Hell" by F1 legend Jackie Stewart, is widely considered the toughest, most dangerous race track in the world. For General Motors' Mark Reuss, 46, who became a certified test driver there when he ran GM's high-performance division, navigating Nurburgring's hazards at high speed is as exhilarating as it is perilous.
"A good scientist is a person with original ideas. A good engineer is a
person who makes a design that works with as few original ideas as
possible" - Freeman Dyson