Russian Prime Minister Vladimir Putin (L [Getty Images]

Russian Prime Minister Vladimir Putin (L) and US Vice President Joe Biden (2nd R) meet on March 10, 2011 with their delegations in Moscow. Putin on March 10 proposed to Biden that Russia and the United States abolish visas in a "historic" step to seal a revival in ties. Biden's visit is aimed at building on the "reset" in relations spearheaded by Russian President Dmitry Medvedev but Putin has until now enjoyed less cordial relations with Washington than his successor as Kremlin chief. AFP PHOTO / RIA-NOVOSTI POOL / ALEXEY DRUZHININ (Photo credit should read ALEXEY DRUZHININ/AFP/Getty Images)

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