Bitcoin futures launch sparks excitement, warnings

Bitcoin will make its debut on a major exchange Sunday, a landmark for the cryptocurrency that has generated enthusiasm among some investors and more than a little anxiety from others.

US spent $630,000 to 'buy' Facebook fans

The US State Department was Wednesday under fire for spending $630,000 over two years to win millions of "likes" on its Facebook pages at a time of severe government austerity measures.

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