Iran's President Hassan Rouhani tweeted historic news on Friday afternoon before quickly deleting it. Then, minutes later, he tweeted about the conversation again. The screenshot below shows Rouhani's initial tweet, a sentence fragment that indicates he had just spoken on the phone with U.S. President Barack Obama. This was the reportedly the first communication between American and Iranian presidents since 1979. Minutes after, the tweet had disappeared from Rouhani's Twitter stream, leaving many questioning its veracity. Only minutes later, Obama confirmed the phone conversation in a press conference and said he had spoken with the Iranian leader. "The very fact...