Russia’s Post Office has issued a collection of stamps and envelopes to mark the 50th jubilee of the US President Barack Obama.The US leader celebrated his birthday on the 4th of August.In one of his recent interviews Mr. Obama said that fifty years ago nobody could imagine Russia and the US as partners. He added that confrontation ended together with the Cold War.He said that the Internet and mass media have made people from all over the globe closer to each other. “It is important to contribute to mutual understating between Russia and the US, one of the world`s leading countries”, Mr. Obama said. Russia`s Post Office also presented the US leader with a postmark featuring his portrait. Mr. Obama liked the gift, stamped several envelopes and then signed one of them with dedication to the museum of the Russian Post Office.