If there was a single word to describe how Burt Rutan and his team felt on the day before their historic flight, it would be confident. All the work preparing SpaceShipOne for its flight has been completed days earlier, and Rutan noted that on Saturday, two days before the planned flight, the hangar was dark all day long. Mike Melvill, the pilot selected to fly SpaceShipOne, could barely contain his enthusiasm during the preflight press conference. “I am ready to go, boy, I am ready to go!” he said in a manner not unlike an athlete revving up for a...