US President Barack Obama has arrived in Moscow to talk with his Russian counterpart, Dmitry Medvedev, who is focusing on further reducing nuclear stockpiles all over the world.
Officials in Russia and USA were both quoted as saying a document had been agreed, but Russia said it was not final.
Both men say they want deep cuts to their current levels of 6,000 nuclear warheads each.
In addition, Russia has been pressing President Obama to scrap a US plan for a missile defence shield in Europe.
Nonetheless, the correspondents in the located say Mr Obama could expect a smoother reception than he received on a 2005 visit to Russia when he and other visiting US Congressmen were detained for three hours at an airport in the Urals city of Perm.
Wish these nuclear talks could bring peace to the world instead of military competition.
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