We have a problem

 作者:楼丛枋     |      日期:2019-03-03 05:10:11
By David L. Chandler WHEN Burt Rutan’s SpaceShipOne makes the first attempt to win the X prize next week, the astronaut at its helm will be following in a long tradition of daredevil test pilots. But unlike previous competitions to push the boundaries of human flight, the X prize brings with it an extra pressure: a deadline. If the $10 million prize has not been won by midnight on 31 December,