DAVID GREENE, HOST:
Good morning, I'm David Greene.
It is Twitter's 8th birthday. To celebrate, the site has put out a tool that lets you see any user's very first tweet. Some were naturals. Warren Buffett's first tweet - Warren is in the house - has been retweeted more than 40,000 times.
Others might cringe at their first contribution. Steve Wozniak, co-founder of Apple, tweeted about his dance lessons: No pain, no gain. Awkward but fun this dancing, I still can't do macarena. That's what he wrote.
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