A special holiday in the Beijing region kept 11.7 million vehicles off the road and closed 10,000 factories while the Asia-Pacific Economic Cooperation summit was in session
Midway through Manchester United's second consecutive terrible season, revenue at the storied soccer club is sliding and share prices are sinking.
Crimea, the former Ukrainian peninsula annexed by Russia, is now witnessing a wave of nationalizations
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Lucky fans got to spend two hours cooking Thanksgiving dinner with the Jets quarterback
Twenty years after Dumb and Dumber came out, thousands of entrepreneurs make a living driving tricked-out pet-care vans
By Douglas MacMillan
Twitter hasn't made a penny—but that's not stopping a whole class of entrepreneurs from trying to build their own businesses on the back of the microblogging pioneer. Twitter makes its code available to outside developers who in turn can create their own tools that sort, analyze, distribute, append ads to, or otherwise interact with the millions of 140-character messages posted to Twitter each day.
From Twitter browsers to ad networks and multimedia tools, third-party programmers have dreamed up dozens of original ways to experience Twitter—and to make money from it. This BusinessWeek slide show tunnels through the many layers of the new Twitter ecosystem.