Low clouds kept shuttle Discovery and its crew of seven from making their much-anticipated return to Earth, and NASA vowed to bring the spacecraft down Tuesday in Florida, California or possibly even New Mexico.

• 低沉的云层阻碍了“发现”号航天飞机和机上七名工作人员预期的返航，美国宇航局（nasa）誓言要在本周二让这架航天飞机重返地球，着陆地点可能在佛罗里达州、加利福尼亚州甚至是新墨西哥州。