The online communications channel between al-Qaida's shadowy leaders and its terrorist operatives has been severely disrupted in recent weeks -- since the July 7, 2005, jihadi attacks on London -- apparently by British intelligence.
NASA's Messenger spacecraft swung by Earth for a Tuesday gravity assist that propelled it deeper into space on its long journey toward Mercury.
NASA has reached a milestone in the testing of solar sails -- a unique propulsion technology that will use sunlight to propel vehicles through space. Engineers have successfully deployed a 20-meter solar sail system that ...
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