庆祝约翰·格伦的历史使命
On February 20, 1962, NASA launched one of the most important flights in American history. The mission? Send a man to orbit Earth, observe his reactions and return him home safely. The pilot of this historic flight, John Glenn, became a national hero and a symbol of American ambition. NASA’s Multiple Axis Space Test Inertia Facility, or Gimbal Rig, was one of the many facilities where Glenn trained for their missions. After three years of training, Glenn rocketed into space aboard the Mercury capsule Friendship 7. He became the third American in space and the first to orbit Earth. The historical flight was no easy feat. At the end of his first orbit, a yaw attitude jet clogged, forcing Glenn to abandon the automatic control…