Twitter

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Quarterback Michael Vick signs with the New York Jets on March 21, 2014 (via Twitter)

A member of the Turkish Youth Union holds a cartoon depicting Turkey's Prime Minister Recep Tayyip Erdogan saying " we will rip out the roots of Twitter" and his Ankara Mayor Melih Gokcek replying "don't say it" during a protest against a ban on Twitter, in Ankara, Turkey, Friday, March 21, 2014. Turkey's attempt to block access to Twitter appeared to backfire on Friday with many tech-savvy users circumventing the ban and suspicions growing that the prime minister was using court orders to suppress corruption allegations against him and his government. (AP Photo/Burhan Ozbilici)

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Members of the Turkish Youth Union hold cartoons depicting Turkey's Prime Minister Recep Tayyip Erdogan during a protest against a ban on Twitter, in Ankara, Turkey, Friday, March 21, 2014. Turkey's attempt to block access to Twitter appeared to backfire on Friday with many tech-savvy users circumventing the ban and suspicions growing that the prime minister was using court orders to suppress corruption allegations against him and his government. Cartoon in center reads: Erdogan, left, to his Ankara Mayor Melih Gokcek " we will rip out the roots of Twitter." Gokcek: "don't say it."(AP Photo/Burhan Ozbilici)

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Justin Casquejo, 16, of New Jersey posted to Twitter in August this photo of himself facing 1 World Trade Center in lower Manhattan.

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Gary Johnson, the Libertarian presidential hopeful, heads to Twitter on Tuesday for a Tweet Chat at 9 p.m. ET, he says, for his 122,000 followers and anyone else. (The Washington Times)

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Wayne Knight, who is best known for his role as Newman on "Seinfeld," took to Twitter on Sunday to debunk an elaborate internet death hoax. (Twitter)

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Twitter photo of the explosion in Upper Manhattan. Twitter/Ethan Klapper @ethanklapper

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Twitter photo of the explosion in Upper Manhattan. Twitter Adnan Islam @orangeadnan

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FILE - In this May 20, 2013, file photo, a tornado moves through Moore, Okla. as northbound traffic on Interstate 35 stops at Indian Hills Road in Moore, Okla. The National Weather Service in Norman has used Twitter and Facebook for years to disseminate weather warnings. But they tried a new approach recently, holding an online “tornado drill.” (AP Photo/Alonzo Adams, File)

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FILE - In this May 31, 2007, file photo, a structure is destroyed after a tornado briefly touched down in Guymon, Okla. The National Weather Service in Norman has used Twitter and Facebook for years to disseminate weather warnings. But they tried a new approach recently, holding an online “tornado drill.” (AP Photo/Guymon Daily Herald, Heather Avey, File)