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It's hard to believe, but seven years ago no one had ever heard of a tweet. Thursday is the anniversary of the first tweet from Twitter co-founder Jack Dorsey. It wasn't profound. He wrote:

Since then the social media company has been an important communication tool in everything from the Arab Spring and Occupy Wall Street, to its use as a megaphone for celebrities. Over the years, its relationship to its free speech principles has changed.

From Trivial To Global Town Hall

Jimmy Fallon is on track to replace Jay Leno as host of The Tonight Show on NBC in 2014, according to unnamed sources in The New York Times and The Hollywood Reporter.

Pope Francis has now been installed and the world's Catholics are looking to see where he will lead the church. But one man in Rome has been trying to make sure the Vatican also deals with the church's troubled past.

David Clohessy, who says he was a victim of sexual abuse at a young age by a Catholic priest, is the director of SNAP, the Survivors Network of those Abused by Priests. By his count, he held 15 news conferences in Rome in the weeks leading up to the conclave at the Vatican.

Vice President Joe Biden told All Things Considered co-host Melissa Block in an interview Wednesday that he and the Obama administration plan to continue to fight for a ban on assault weapons to be included in a larger bill in Congress.

That despite signs that such a ban doesn't have enough support, even from members of Biden's own party, to make it through the Democratic-controlled Senate.