2003年2月1日,美国“哥伦比亚号”航天飞机在返回大气层时失事,七名航天员全部罹难。噩耗传来,举世震惊。2月7日,美国航空航天局(NASA)公布了由地面拍摄的“哥伦比亚号”在失事前最后时刻的照片,照片表明航天飞机的左翼当时已受到严重损害。灾难发生后,美国政府成立了独立的调查委员会来调查事故原因。 On February 1, 2003, the U.S. space shuttle Columbia made a crash when it returned to the atmosphere and killed all seven astronauts. News came, shocked the world. On February 7, NASA released a photograph of the “Columbia,” taken from the ground, at the last minute before the crash, showing that the space shuttle’s left wing was seriously damaged at the time. After the disaster, the U.S. government set up an independent investigation commission to investigate the cause of the accident.