And is this one of them chain letter type things?

Russia Calls for Iran’s Flexibility to End Nuclear Impasse
Readiness to Boost Iran’s Defense Capabilities
By Nader Uskowi, Uskowi on Iran, Sept. 12, 2013

Russia said that Tehran should show flexibility and the “Six” (P5+1) should react to positive steps which are expected from Iran to end the impasse over the country’s nuclear program, RIA Novosti reported today.

“We coherently and permanently speak for the settlement of the situation related to the Iranian nuclear program only through political and diplomatic means, a military solution is absolutely inadmissible. We believe that the negotiations have a chance of success. It is necessary that Iran shows flexibility and readiness to meet the requirements of the international community,” said Yuri Ushakov, an aide to Russian President Putin, told reporters (RIA Novosti/Reuters, 12 September)

The Russian official made the comments ahead of Putin’s meeting with Iranian President Hassan Rouhani. The two will meet tomorrow in Bishkek on the sidelines of the Shanghai Cooperation Organization (SCO) Summit.

Yesterday, the respected Russian daily Kommersant reported that Putin is ready to offer Rouhani the delivery of the advanced S-300 anti-aircraft missile system and construction of a second nuclear reactor.

The Kommersant report and Ushakov’s comments today could indicate Russia’s eagerness to extract concessions from Iran on the nuclear issue in return for boosting the country’s defense capabilities in order to end the nuclear impasse.

Iran confirms exchange of letters with Obama
Reuters, DUBAI | Tue Sep 17, 2013 9:21am EDT

Iran said on Tuesday that President Hassan Rouhani had exchanged letters with U.S. President Barack Obama, confirming a rare contact between leaders of the two nations at loggerheads over Iran's nuclear program, the Syrian war and other issues [....]

Iranian Foreign Ministry spokeswoman Marzieh Afkham said on Tuesday that Obama had sent Rouhani a message of congratulations on the occasion of his election.

"This letter has been exchanged," Afkham said, according to the ISNA news agency. "The mechanism for exchanging these letters is through current diplomatic channels."

Though rare, it is not the first time letters have been exchanged. Rouhani's predecessor, Mahmoud Ahmadinejad, wrote one to Obama three years ago, and Obama wrote twice directly to Supreme Leader Ayatollah Ali Khamenei, in 2009 and 2012.

Obama said in an interview broadcast on Sunday he had exchanged letters with Rouhani. The two men will speak on the same day at the U.N. General Assembly next week, though there are currently no plans for them to meet [....]