Astronaut John Glenn used Utah's Bonneville Salt Flats as a landmark from space, but on Earth, amateur motorsports devotees have used the blistering hot, flat land as a speed laboratory for more than a century. On August 22, 1949, the hot rodders joined the pageant of power with their handcrafted cars, trucks, and motorcycles for a one-time event but never stopped coming back, trying to go faster every run down the multi-mile course. All came looking...