Pakistani authorities today briefly blocked access to Twitter on the ground that it was being used to promote a contest on Facebook for blasphemous caricatures of Prophet Mohammed before Prime Ministe...

A fourth man faces terrorism charges in a separate plot to toss Molotov cocktails during protests against the NATO summit in Chicago, police said on Sunday.

A 150-foot-wide, 140,000 tonne asteroid may come so close to Earth early next year that it might destroy communications satellites.

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