A U.S. security spokesman assured reporters on Friday that Moscow and Washington had overcome their "historical" differences.
"It is important for the world community to understand that Russia and the United States have moved beyond some historical issues and are working today as they should do to address the common challenges that we face," National Security Council Spokesman Mike Hammer told a press briefing at the Foreign Press Center in Washington.
"And of course if there are disagreements, we have to voice those openly, without hesitation," he added.
Despite the optimism, a number of analysts have suggested that serious differences exist between the U.S. and Russia on Iran.
But Hammer said Washington and Moscow were on their way toward developing a common stance on the Islamic country's nuclear activities.
Earlier this week, a senior U.S. diplomat praised the changes in the Russian stance on the Iranian nuclear problem, which have recently moved Moscow closer to Washington's assessment of the situation.
"Tactically, I would say we are closer than ever before," U.S. Ambassador to Russia John Beyrle said.
Iran Six envoys last met in New York on January 16 but decided against immediate sanctions against Tehran as they look to find new political and diplomatic solutions to the problem.
The Iran Six are Russia, the United States, China, Britain, France and Germany.
Tehran, which is already under three sets of United Nations sanctions for refusing to halt uranium enrichment, recently announced plans to build 10 new uranium enrichment facilities. Western powers suspect it of pursuing atomic weapons, while the Islamic Republic says its nuclear program is aimed at the generation of energy for peaceful purposes.
WASHINGTON, January 22 (RIA Novosti)
