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In April, Romney used a YouTube video to announce the formation of an exploratory committee for a 2012 presidential bid. He tweeted his intention to announce his run last week, and he made it official in Thursday's speech at a family farm in New Hampshire.
Although most of us couldn't be at Scamman Farm ourselves, social media offers a glimpse of what the event was like.
[View the story "Mitt Romney's Bid For President As Told By Social Media" on Storify]