The space shuttle Endeavour has arrived home safely and NASA is defending its decision not to repair the gouge in the shuttle's underbelly in space.
The space shuttle Endeavour has arrived home safely and NASA is defending its decision not to repair the gouge in the shuttle's underbelly in space.
“奋进”号航天飞机终于安全着陆了而美国宇航局正在为他们没有修理太空船腹部凿槽的决定进行辩护。